# List of allied military operations of the Vietnam War (1966)

This article is a list of known military operations of the Vietnam War in 1966, conducted by the armed forces of the Republic of Vietnam, the United States and their allies.
| Date Duration | Operation Name | Unit(s) – Description | Location | VC–PAVN KIA | Allied KIAs |
| 1966 | Operation Lightning Bug | USAF air interdiction operations | | | |
| Jan 1 – 8 | Operation Marauder/Operation An Dan 564$^{:30}$ | 1st Infantry Division, 173rd Airborne Brigade, 1st Battalion, Royal Australian Regiment and ARVN operation in Plain of Reeds area of the Mekong Delta | Hậu Nghĩa Province | 268 | 15 US, 31 ARVN |
| Jan 1 – 18 | Operation Jefferson | A combined ROK 2nd Marine Brigade and paratroops of ARVN 47th Regiment search and destroy operation | Phú Yên Province | | |
| Jan 1 – 20 | Operation Matador III | 1/1 Cavalry search and destroy operation along the Cambodian border | Kon Tum and Pleiku Provinces | | |
| Jan 3 – 4 | Operation War Bonnet | 2nd Battalion, 9th Marines and 3rd Tank Battalion search and destroy operation | Quảng Nam Province | | |
| Jan 3 – 8 | Operation Hang Over | 2nd Battalion, 327th Infantry Regiment search and destroy operation | Ninh Thuận Province | | |
| Jan 3 – 8 | Operation Long Lance | 1st Battalion, 1st Marines search and destroy operation | Quảng Nam Province | | |
| Jan 3 – 8 | Operation Quick Kick | 1st Brigade, 1st Infantry Division search and destroy operation | Bình Dương Province | | |
| Jan 8 – 14 | Operation Crimp$^{:30}$ | Operation by two brigades of the 1st Infantry Division and the 1st Battalion, Royal Australian Regiment | Ho Bo Woods, 20 km north of Cu Chi, Bình Dương Province | 129 | 22 |
| Jan 9 – 11 | Operation Flying Tiger VI | ARVN and ROK Capital Division search and destroy operation | Bình Định Province | 192 | 11 |
| Jan 11 – 14 | Operation Quick Kick II | 1st Brigade, 1st Infantry Division search and destroy operation | Bình Dương Province | | |
| Jan 11 – 17 | Operation Mallard$^{:40–4}$ | 1st Battalion, 3rd Marines and 3rd Battalion, 7th Marines search and destroy operation | An Hoa, Quảng Nam Province | | |
| Jan 12 – 25 | Operation Short Fuse | 2/1 Cavalry search and destroy operation | Tây Ninh Province | | |
| Jan 12 – 31 | Operation Buckskin$^{:30}$ | 3rd Brigade, 1st Infantry Division search and destroy operation. Follow-up to Operation Crimp | Ho Bo Woods to the north and west of Cu Chi | 93 | |
| Jan 13 – 17 | Operation Matador II | 2/1 Cavalry search and destroy operation | Bình Định, Kon Tum and Pleiku Provinces | | |
| Jan 13 – 17 | Operation Quick Hop/Operation Tyler | 2nd Battalion, 327th Airborne Infantry Regiment search and destroy operation | Bình Thuận Province | | |
| Jan 15 – 17 | Operation Big Lodge | 2nd Battalion, 9th Marines search and destroy operation | Quảng Nam Province | | |
| Jan 15 – 19 | Operation Red Ball IV | 1st Brigade, 1st Infantry Division resupply operation | III Corps | | |
| Jan 17 – 18 | Operation Pioneer I | 2nd Battalion, 16th Infantry Regiment search and destroy operation | Biên Hòa Province | | |
| Jan 18 – 20 | Operation Retriever I | 173rd Airborne Brigade search and destroy operation | Binh Hoa and Bình Dương Provinces | | |
| Jan 19 – Feb 21 | Operation Van Buren | 101st Airborne Division, ROK 2nd Marine Brigade and ARVN 47th Regiment rice security operation | Phú Yên Province | 679 | 54 US, 45 ROK |
| Jan 20 – 24 | Operation Kamehameha I | 3rd Brigade, 25th Infantry Division security operation along Route 19 | Pleiku Province | | |
| Jan 24 – 26 | Operation Pioneer II | 2nd Brigade, 1st Infantry Division search and destroy operation | Biên Hòa Province | | |
| Jan 24 – 26 | Operation Quick Kick III | 1st Brigade, 1st Infantry Division search and destroy operation | Bình Dương Province | | |
| Jan 24 – 30 | Operation Retriever II | 173rd Airborne Brigade search and destroy operation | Binh Hoa and Bình Dương Provinces | | |
| Jan 24 – Mar 6 | Operation Masher/White Wing/Thang Phong II$^{:19–25}$ | 1st Cavalry Division, ARVN 22nd Division Airborne Brigade and 1st Regiment ROK Capital Division operation USMC Operation Double Eagle links in cross border segment | Bình Định Province | 2389 | 288 US, 10 ROK, 119 ARVN |
| Jan 28 – Feb 1 | Operation Red Ball V | 1st Brigade, 1st Infantry Division resupply operation | Bình Dương Province | | |
| Jan 28 – Feb 15 | Operation Mallet | 2nd Brigade, 1st Infantry Division search and destroy operation to open Route 15 | Long Khánh Province | | |
| Jan 28 – Feb 17 | Operation Double Eagle$^{:19–25}$ | 3rd Battalion, 1st Marines, 2nd Battalion, 3rd Marines, 2nd Battalion, 4th Marines, 2nd Battalion, 9th Marines operation linking in with Operation Masher/White Wing, Operation Lien Ket 22 and Operation Thang Phuong II | Quảng Ngãi and Quảng Trị Provinces | 312 | 24 |
| Jan 29 – 31 | Operation Kamehameha II | 3rd Brigade, 25th Infantry Division security operation along Route 19 | Pleiku Province | | |
| Jan 30 – 31 | Operation Bobcat | US search and destroy operation | III Corps | | |
| Jan 30 – Feb 3 | Operation Bobcat Tracker | 2nd Brigade, 25th Infantry Division search and destroy operation | Hậu Nghĩa Province | | |
| Feb | Operation Reconstruction | 1st Brigade, 101st Airborne Division, ROK 2nd Marine Brigade and ARVN 47th Regiment search and destroy operation | south of Tuy Hòa Phú Yên Province | | |
| Feb 3 – 9 | Operation Quick Kick IV | 1st Brigade, 1st Infantry Division search and destroy operation | Bình Dương Province | | |
| Feb 3 – 15 | Operation Taro Leaf | 2nd Brigade, 25th Infantry Division search and destroy operation | Hậu Nghĩa Province | | |
| Feb 4- 9 | Operation Roundhouse | 173rd Airborne Brigade and 1st Battalion, Royal Australian Regiment search and destroy operation | Biên Hòa and Bình Dương Provinces | | |
| Feb 5 – 8 | Operation Taylor | 3rd Brigade, 25th Infantry Division search and destroy and road clearing operation | Kon Tum and Pleiku Provinces | | |
| Feb 6 – Mar 6 | Operation Thừa Thiên 177 | ARVN operation | Thừa Thiên Province | 183 | 17 |
| Feb 7 – 11 | Operation Road Runner VI | 3rd Brigade, 1st Infantry Division road clearing and security operation along Route 13 | north of Bến Cát District, Bình Dương Province | | |
| Feb 7 – 16 | Operation Taut Bow | 3rd Reconnaissance Battalion reconnaissance in force operation | "Happy Valley", Quảng Nam Province | | |
| Feb 7 – May 1972 | Operation Shed Light | USAF programme to develop night and adverse weather interdiction capabilities | South Vietnam & Laos | | |
| Feb 8 – 9 | Operation Bald Eagle | 3rd Brigade, 1st Infantry Division search and destroy operation | III Corps | | |
| Feb 9 – 21 | Operation Kamehameha III | 3rd Brigade, 25th Infantry Division security operation along Route 19 | Bình Định and Pleiku Provinces | | |
| Feb 11 – 28 | Operation Eagle's Claw | 1st Cavalry Division operation | Bình Định Province | 340 | 172 |
| Feb 11 – Mar 2 | Operation Rolling Stone$^{:30}$ | 1st Infantry Brigade, 1st Battalion, Royal Australian Regiment and the New Zealand artillery combined search and destroy, road repair, and pacification operation | 30 km northwest of Bien Hoa Air Base, Bình Dương Province | 154 | 11 US |
| Feb 12 – 16 | Operation Entree | 173rd Airborne Brigade search and destroy operation | Biên Hòa Province | | |
| Feb 12 – 16 | Operation Evansville | 1st Infantry Division search and destroy operation | Bình Dương Province | | |
| Feb 13 | Operation An Dan 14/66 | ARVN operation | Long An Province | 150 | 21 |
| Feb 14 – 16 | Operation Breezeway | 1st Battalion, 16th Infantry Regiment road clearing and security operation along Route 13 | Bình Dương Province | | |
| Feb 14 – 16 | Operation Paddy Bridge | 2nd Battalion, 27th Infantry Regiment search and destroy operation | Hậu Nghĩa Province | | |
| Feb 15 – 21 | Operation Thang Long 234 | ARVN operation | Darlac Province | 270 | 62 |
| Feb 17 – 28 | Operation Double Eagle II$^{:34}$ | BLT 3rd Battalion, 1st Marines and 3rd Battalion, 12th Marines search and destroy operation to engage the 1st VC Regiment | Que Son Valley | 125 | |
| Feb 18 – 19 | Operation Belt Line | 3rd Brigade, 1st Infantry Division road clearing and security operation along Route 13 | Bình Dương Province | | |
| Feb 21 – 27 | Operation Mastiff | 2nd and 3rd Brigades, 1st Infantry Division search and destroy operation | Michelin Rubber Plantation and the Boi Loi woods, Bình Dương, Binh Long and Tây Ninh Provinces | | |
| Feb 22 – 24 | Operation Clean Sweep I | 2nd Brigade, 25th Infantry Division and ARVN 49th Regiment search and destroy operation | Cu Chi area | 11 | 5 US |
| Feb 22 – Mar 2 | Operation Lam Son 235$^{:248}$ | 2 Regiments of the ARVN 1st Division search and destroy operation | Quảng Trị Province | 444 | 35 |
| Feb 25 – Mar 24 | Operation Garfield | 3rd Brigade, 25th Infantry Division operation | Darlac Province | 124 | 17 |
| Feb 26 – 28 | Operation Kolchak I | 2nd Brigade, 25th Infantry Division search and destroy operation | Hậu Nghĩa Province | 5 | |
| Feb 26 – Mar 1 | Operation Phoenix | 173rd Airborne Brigade search and destroy operation | Biên Hòa Province | | 15 |
| Feb 26 – Mar 24 | Operation Harrison | 1st Brigade, 101st Airborne Division search and clear operation | Tuy Hòa area, Phú Yên Province | 285 | 42 |
| Feb 27 – Mar 3 | Operation New York$^{:51–6}$ | 2nd Battalion, 1st Marines, and HMM-163 sweep operation joining with ARVN Operation Thừa Thiên 177 | east of Phu Bai, Thừa Thiên Province | 122 | 15 |
| Mar 1 – 2 | Operation Beer Barrel | 3rd Brigade, 1st Infantry Division road security operation | Bình Dương Province | | |
| Mar 1 – 5 | Operation Black Horse | 2/1 Cavalry search and destroy operation | Bình Định Province | | |
| Mar 1 – 5 | Operation Hattiesburg | 2nd Brigade, 1st Infantry Division search and destroy operation | Tây Ninh Province | | |
| Mar 3 – 6 | Operation Red Ball VI | 1st Brigade, 1st Infantry Division route security for resupply convoys | Biên Hòa and Bình Dương Provinces | | |
| Mar 3 – 7 | Operation Cocoa Beach | 3rd Brigade, 1st Infantry Division search and destroy operation | Bình Dương Province | 199 | 15 |
| Mar 4 | Operation Waikiki | 2nd Brigade, 25th Infantry Division search and destroy operation | Hậu Nghĩa Province | | |
| Mar 4 – 7 | Operation Utah/Operation Lien Ket 26$^{:109–19}$ | 3rd Battalion, 1st Marines, 2nd Battalion, 4th Marines, 1st Battalion, 7th Marines, 2nd Battalion, 7th Marines and ARVN 2nd Division search and destroy operation against the PAVN 36th Regiment and VC Main Force units operation. First USMC contact with the NVA | 11 km northwest of Quảng Ngãi City, | 632 | 83 US, 32 ARVN |
| Mar 6 – 8 | Operation Boston | 3rd Brigade, 1st Infantry Division search and destroy operation | Bình Dương Province | | |
| Mar 7 – 24 | Operation Silver City | 1st Brigade, 1st Infantry Division, 173rd Airborne Brigade, 1st Battalion, Royal Australian Regiment and ARVN 10th Division search and destroy operation. Major enemy unit encountered is the VC 271st Main Force Regiment | along the Song Be River, Bình Dương Province/Long Khánh Province border area | 336 | 107 |
| Mar 7 – 28 | Operation Jim Bowie | 2/1 Cavalry and 3/1 Cavalry search and destroy operation | Bình Định Province | | |
| Mar 9 – 10 | Operation Los Angeles | 3rd Brigade, 1st Infantry Division route and convoy security operation along Route 13 | Bình Dương Province | | |
| Mar 12 | Operation Toledo | 3rd Brigade, 1st Infantry Division security operation | III Corps | 11 | 9 |
| Mar 13 – 15 | Operation Tampa (1966) | 3rd Brigade, 1st Infantry Division security operation | III Corps | | |
| Mar 13 – 17 | Operation Salem | 1st Battalion, 18th Infantry Regiment search and destroy operation | III Corps | | |
| Mar 14 – 19 | Operation Honolulu | 2nd Brigade, 25th Infantry Division search and destroy operation | Cu Chi, Hậu Nghĩa Province | | |
| Mar 14 – 21 | Operation Buchanan/Operation Wyatt Earp/Operation Kam IV | 2/1 Cavalry 2nd Battalion, 35th Infantry Regiment reconnaissance in force and security operation along Route 19 | II Corps | | |
| Mar 14 – 21 | Operation Wyatt Earp | 2/1 Cavalry and 2nd Battalion, 35th Infantry Regiment reconnaissance in force and security operation on Route 19 | II Corps | | |
| Mar 17 – 18 | Operation Wheaton | 2nd Brigade, 1st Infantry Division operation | III Corps | | |
| Mar 17 - 18 | Operation Massachusetts | 2nd Battalion, 4th Marines | | | |
| Mar 18 – 19 | Operation Palestine | 3rd Brigade, 1st Infantry Division security operation | III Corps | | |
| Mar 20 – 23 | Operation Oregon$^{:65–9}$ | 2nd Battalion, 1st Marines and 1st Battalion, 4th Marines search and destroy operation | Quảng Trị Province | | |
| Mar 20 – 24 | Operation Cuu Long 15 | ARVN operation | Kien Tuong Province | 219 | 3 |
| Mar 20 – 25 | Operation Texas/Operation Lien Ket 28$^{:120–7}$ | 3rd Battalion, 1st Marines, 3rd Battalion, 7th Marines, 2nd Battalion, 4th Marines, ARVN 5th Airborne Battalion and Republic of Vietnam Marine Corps combined reaction force operation landing near An Hoa to encounter the 60th and 90th battalions of the 1st VC Regiment and the 11th Battalion, 21st NVA Regiment | An Hoa | 623 | 99 |
| Mar 20 – 28 | Operation Kings$^{:78–97}$ | 3rd Battalion, 3rd Marines, 2nd Battalion, 9th Marines and 3rd Tank Battalion search and destroy operation | 25 km southwest of Da Nang, Quảng Nam Province | | |
| Mar 21 | Operation Lê Lợi 15 | ARVN Special Forces operation | Darlac Province | 134 | 10 |
| Mar 21 – May 5 | Operation Benning | US security operation | II Corps | | |
| Mar 23 – 25 | Operation Brownsville | 3rd Brigade, 1st Infantry Division search and destroy operation | III Corps | | |
| Mar 23 – 26 | Operation Brunswick | US security and road clearing operation along Route 13 | III Corps | | |
| Mar 23 – 27 | Operation Mang Ho V | ROKA Capital Division search and destroy operation | Bình Định Province | 349 | 17 |
| Mar 23 – 27 | Operation Monroe | 2nd Brigade, 1st Infantry Division search and destroy operation | III Corps | | |
| Mar 24 – 25 | Operation Waycross | 1st Brigade, 1st Infantry Division and ARVN 5th Division search and destroy operation | northwest of Phu Loi, Bình Dương Province | | |
| Mar 24 – 26 | Operation Dan Chi 211/B | ARVN operation | Ba Xuyen Province | 245 | 17 |
| Mar 24 – 29 | Operation Olympa | 3rd Brigade, 1st Infantry Division search and destroy operation | Bình Dương Province | | |
| Mar 25 – Apr 8 | Operation Lincoln | 1st and 3d Brigades, 1st Cavalry Division and 3rd Brigade, 25th Infantry Division search and destroy/reconnaissance in force operation against the same PAVN units that had participated in the battle of the Ia Drang Valley | vicinity of Plei Me and the Chu Pong Massif, Pleiku and Darlac Provinces | 522 | 51 |
| Mar 26 – Jul 21 | Operation Fillmore | 1st Brigade, 101st Airborne Division, ROK 2nd Marine Brigade and ARVN 47th Regiment operation | vicinity of Tuy Hòa, Phú Yên Province | 134 | 8 US |
| Mar 26 – Apr 6 | Operation Jackstay$^{:300}$ | SLF 1st Battalion, 5th Marines and 2 Battalions of Vietnamese Marines search and clear operation along the Long Tau shipping channel | Rung Sat Special Zone | 63 | 6 |
| Mar 26 – Sep 23 | Operation Su Bok | ROK Capital Division operation | Bình Định Province | 299 | 23 |
| Mar 27 – Apr 1 | Operation Red Ball VII | 1st Battalion, 28th Infantry Regiment search and destroy operation | III Corps | | |
| Mar 27 – May 5 | Operation Buchanan II | 2/1 Cavalry 2nd Battalion, 35th Infantry Regiment road clearing operation along Route 19 from Qui Nhơn to Pleiku | Pleiku Province | | |
| Mar 28 – 30 | Operation Indiana/Operation Lien Ket 30$^{:127–31}$ | 1st Battalion, 7th Marines and ARVN 5th Regiment, 2nd Division operation to reinforce ARVN Operation Quyet Tang 72 | Quảng Ngãi Province | 169 | 11 |
| Mar 29 – 30 | Operation Alabama | USMC search and destroy operation | III Corps | | |
| Mar 29 – Apr 5 | Operation Circle Pines | 1st Battalion, 5th Infantry Regiment and ARVN 7th Regiment operation | Ho Bo Woods, Hậu Nghĩa Province | 170 | 32 |
| Mar 30 – Apr 15 | Operation Abilene | 1st Infantry Division and 1st Battalion, Royal Australian Regiment operation | Phước Tuy Province | 92 | 48 |
| Apr | Operation Cuu Long 7 | ARVN 7th Division search and destroy operation | Kien Tuong Province | 140 | 11 |
| Apr | Operation Lam Son 255 | ARVN 1st Division operation | Quảng Tín Province | 33 | |
| Apr | Operation Nevada/Operation Lien Ket 34 | 1st Battalion, 2nd Marines, 2nd Battalion, 7th Marines, ARVN 2nd Division and VNMC search and destroy operation | Batangan Peninsula, Quảng Ngãi Province | 68 | 3 |
| Apr 1 – 7 | Operation York | 1st Battalion, 28th Infantry Regiment search and destroy operation | III Corps | | |
| Apr 1 – 11 | Operation Orange | 1st Battalion, 3rd Marines search and destroy operation | near Thường Ðức, 40 km southwest of Da Nang, Quảng Nam Province | 57 | 18 |
| Apr 2 – 13 | Operation Bun Kae 66-5 | ROK Capital Division operation | Bình Định Province | 292 | 23 |
| Apr 6 – 8 | Operation Kahuku | 1st Battalion, 5th Infantry Regiment and ARVN 49th Regiment search and destroy operation | west of Cu Chi | 26 | |
| Apr 8 – 10 | Operation Iowa | 3rd Battalion, 1st Marines and 2nd Battalion, 4th Marines search and destroy operation | Quảng Tín Province | | |
| Apr 9 – 25 | Operation Denver | 173rd Airborne Brigade and 1st Battalion, Royal Australian Regiment search and destroy operation | vicinity of Sông Bé, Phước Long Province | | |
| Apr 11 – 14 | Operation Makaha | 2nd Brigade, 25th Infantry Division search and destroy operation northwest of Cu Chi | Hậu Nghĩa Province | | |
| Apr 11 – 17 | Operation Mosby I (part of Operation Lincoln) | 1/1 Cavalry 3/1 Cavalry and 5th Battalion, 14th Cavalry Regiment reconnaissance in force along Cambodian border | western Kon Tum and Pleiku Provinces | | |
| Apr 12 – May 18 | Operation Austin | 1st Brigade, 101st Airborne Division operations | Bình Thuận, Bình Tuy, Lâm Đồng, Phước Long and Quang Doc Provinces | | |
| Apr 12 – 26 | Operation Austin I | 1st Brigade, 101st Airborne Division search and destroy operation | upper Dak Som River valley, III Corps | | |
| Apr 12 – 26 | Operation Austin II | 1st Brigade, 101st Airborne Division search and destroy operation | northwest of Phan Thiết | | |
| Apr 13 – 14 | Operation Kaena | 2nd Brigade, 25th Infantry Division search and destroy operation in support of Operation Makaha | Hậu Nghĩa Province | | |
| Apr 13 – 14 | Operation Kalamazoo | 1st Battalion, 5th Infantry Regiment operation | Ho Bo Woods northwest of Cu Chi | 26 | 7 |
| Apr 13 – May 1 | Operation Longfellow | 3rd Brigade, 25th Infantry Division and ARVN 42nd Regiment search and destroy operation to search the area west of Route 14 north from Dak To toward Dak Pek in support of Army Engineers repairing and improving Route 14 | Kon Tum Province | | |
| Apr 14 – 16 | Operation Quyet Thang 184 | ARVN 2nd Division operation | Quảng Ngãi Province | 206 | 11 |
| Apr 15 – 17 | Operation Bolivar | 3rd Brigade, 1st Infantry Division road clearing operation from Lai Khe to Phu Cuong | | | |
| Apr 15 – 20 | Operation Miami | 1st Brigade, 1st Infantry Division search and destroy operation | III Corps | | |
| Apr 16 – 21 | Operation Kahala | 2nd Brigade, 25th Infantry Division search and destroy operation | Hậu Nghĩa Province | 55 | 3 |
| Apr 17 – 20 | Operation Yell | 1st Battalion, 1st Marines and 2nd Battalion, 1st Marines search and destroy operation | Quảng Nam Province | | |
| Apr 17 – May 1 | Operation Virginia$^{:140–3}$ | 1st Battalion, 1st Marines search and destroy and reconnaissance in force operation | vicinity of Khe Sanh Special Forces camp, Quảng Trị Province | | |
| Apr 17 – May 4 | Operation Lexington | 2nd Brigade, 1st Infantry Division saturation patrolling as a follow-up to Operation Jackstay | north of the Rung Sat Special Zone | | |
| Apr 17 – Jun 9 | Operation Lexington III | 1st Battalion, 18th Infantry Regiment search and destroy operation | Rung Sat Special Zone, Biên Hòa Province | | |
| Apr 18 – 20 | Operation Otsego | 1st Infantry Division search and destroy operation | Bình Dương Province | | |
| Apr 20 – 21 | Operation Bristol | US operation | III Corps | | |
| Apr 20 – 22 | Operation Omaha | 2nd Brigade, 1st Infantry Division search and destroy and road clearing operation on Route 13 | between Chơn Thành District and Lai Khe | | |
| Apr 20 – May 10 | Operation Georgia | 1st Battalion, 4th Marines, 2nd Battalion, 4th Marines, 3rd Battalion, 4th Marines and 3rd Battalion, 9th Marines search and destroy operation around the An Hoa industrial complex and Nhong Son | Quảng Nam Province | 103 | 8 |
| Apr 21 – 25 | Operation Dan Chi 219C | ARVN 21st Division operation | Chuong Thien Province | 247 | 20 |
| Apr 21 – May 3 | Operation Mosby II | 2/1 Cavalry reconnaissance in force and interdiction of VC movement west of Route 14 | Kon Tum and Pleiku Provinces | | |
| Apr 22 – 23 | Operation Bowie | 3rd Brigade, 1st Infantry Division and ARVN 5th Division search and destroy operation and saturation patrolling along Route 13 | vicinity of Lai Khe | | |
| Apr 22 – 23 | Operation Chattanooga | 1st Battalion, 26th Infantry Regiment search and destroy operation | III Corps | | |
| Apr 22 – 24 | Operation Hot Springs/Operation Lien Ket 36 | 3rd Battalion, 1st Marines, 2nd Battalion, 7th Marines, 3rd Battalion, 7th Marines and ARVN 5th Regiment, VNMC 1st Battalion and 5th Airborne Battalion operation | Quảng Ngãi Province | 103 | 8 |
| Apr 24 – May 17 | Operation Birmingham$^{:30}$ | 1st Infantry Division and ARVN 5th Division multi-brigade search and destroy operations on the eastern flank of War Zone C to open Route 13 from Saigon to the north and engage the Viet Cong 9th Division | Tây Ninh Province | 119 | 56 US |
| Apr 26 – 28 | Operation Bee Bee | 3/1 Cavalry show of force operation | near Bong Son, Bình Định Province | | |
| Apr 26 – 30 | Operation Wyoming | 3rd Battalion, 1st Marines and 2nd Battalion, 5th Marines search and destroy operation | 15 km northwest of Chu Lai, Quảng Tín Province | | |
| Apr 27 – May 2 | Operation Osage$^{:143}$ | SLF 1st Battalion, 5th Marines rice harvest security operation | Thừa Thiên Province | | |
| Apr 27 – May 12 | Operation Maili | 2nd Brigade, 25th Infantry Division search and destroy operation | Hậu Nghĩa Province | | |
| Apr 27 – May 12 | Operation Maimi | 1st Brigade, 1st Infantry Division road clearing operation | Tân Uyên District | | |
| May | Operation Khung Long | ARVN operation | Bình Định Province | 30 | 19 |
| May | Operation Xay Dung 31 | ARVN operation | Bình Long Province | 33 | 29 |
| May 1–18 | Operation Austin IV | 1st Brigade, 101st Airborne Division, 173rd Airborne Brigade and ARVN 45th Regiment operation | Quang Duc Province and Phước Long Province | 101 | 9 |
| May 2 – 12 | Operation Lihue | 2nd Brigade, 25th Infantry Division security operation on Route 22 | between Cu Chi and Tây Ninh | | |
| May 3 – 15 | Operation Lewis and Clark | 2/1 Cavalry reconnaissance in force operation | from Pleiku to An Khê | | |
| May 4–6 | Operation Dexter | 173rd Airborne Brigade search and destroy operation | Phước Thành Province | | |
| May 4–7 | Operation Cherokee | 1st Battalion, 1st Marines, 2nd Battalion, 4th Marines and 3rd Battalion, 4th Marines search and destroy operation | Thừa Thiên Province | | |
| May 4–16 | Operation Davy Crockett | 3/1 Cavalry and ARVN 22nd Division search and destroy operation revisited the Operation Masher/White Wing area; the PAVN and VC offered resolute resistance, often entrenched or firing out of large, hardened clay anthills | near Bong Son in Bình Định Province | 345 | 156 |
| May 7–9 | Operation Hollingsworth | 1st Infantry Division four Battalion air assault on suspected VC headquarters | Tây Ninh Province | | |
| May 9 – 14 | Operation Montgomery/Operation Lien Ket 40 | 1st Battalion, 5th Marines, 1st Battalion, 7th Marines, 2nd Battalion, 7th Marines and VNMC 2nd & 5th Battalions security operation | Quảng Ngãi Province | | |
| May 10 – 12 | Operation Wayne$^{:143}$ | 4th Marines search and destroy operation 10 km southwest of Phu Bai | Thừa Thiên Province | | |
| May 10 – Jul 31 | Operation Paul Revere/Operation Than Phong 14 | 3rd Brigade 25th Infantry Division, 1 Battalion from the 2/1 Cavalry, Troop B, 1st Squadron, 9th Cavalry Regiment, 2 ROKA Battalions and 2 ARVN Battalions border screening, area-control operation which thwarts a VC monsoon season offensive | Darlac and Pleiku Provinces | 546 | 63 US, 16 ARVN |
| Aug 25 – Oct 18 | Operation Paul Revere III | 2nd Brigade, 4th Infantry Division, 2nd and 3rd Brigades 25th Infantry Division and 3/1 Cavalry operation | 26 km west of Pleiku | 46 | 3 |
| May 12–13 | Operation Asheville | 4th Battalion, 9th Infantry Division search and destroy operation | III Corps | | |
| May 14–16 | Operation Dan Chi 227 | ARVN operation | An Xuyen Province | 247 | 1 |
| May 15 – 17 | Operation Yuma | 3rd Battalion, 7th Marines search and destroy operation | Quảng Ngãi Province | | |
| May 16 | Operation Wahiawa | 1st and 2nd Brigades, 25th Infantry Division search and destroy operation in the Bo Loi Woods, Ho Bo Woods and Filhol Plantation | Hậu Nghĩa Province | 103 | 25 |
| May 16 – Jun 5 | Operation Crazy Horse/Operation Bun Kae 66-7$^{:107}$ | 1st Cavalry Division, ROK Capital Division and ARVN operation | between Vĩnh Thạnh and Soui Ca Valleys of Bình Định Province | 501 | 29 |
| May 17 | Operation Dan Chi 228B | ARVN operation | Bạc Liêu Province | 267 | 6 |
| May 17 – 21 | Operation Providence | 1st Brigade, 1st Infantry Division search and destroy and route security operation from Tân Uyên District to Phuoc Vinh | | | |
| May 19–26 | Operation El Paso I | 3rd Brigade, 1st Infantry Division search and destroy operation and reinforcement of Lộc Ninh Special Forces camp | Bình Long Province | | |
| May 20 – 22 | Operation Morgan | 3rd Battalion, 7th Marines and 2nd Battalion, ARVN 4th Regiment search and destroy operation | Quảng Ngãi Province | | |
| May 21 – 23 | Operation Long Phi 971 | ARVN operation | Kiên Giang Province | 224 | 6 |
| May 23 – Jun 25 | Operation Athens | 3rd Battalion 4th Marines search and operation | 25 km south of Huế in Thừa Thiên Province | | |
| May 24 | Operation Cheyenne I | 1st Battalion, 5th Marines search and destroy operation along the coast | 20 km north of Chu Lai | | |
| May 24 – Jun 4 | Operation Hardihood | 173rd Airborne Brigade and 1st Battalion, Royal Australian Regiment multi-battalion reconnaissance operation and the clearance of Nui Dat and the establishment of the 1st Australian Task Force base area | Vũng Tàu area, Phước Tuy Province | 48 | |
| May 25 – 28 | Operation Mobile | 17th Marines, ARVN 5th Regiment and VNMC 5th Battalion search and destroy operation | Quảng Ngãi Province | | |
| May 27–28 | Operation Chicago | US security operation | III Corps | | |
| May 30 | Operation Quyet Thang 296 | ARVN operation | Quảng Tín Province | 100 | 2 |
| May 30 – Jun 6 | Operation Reno I | 2nd Brigade, 1st Infantry Division search and destroy operation | III Corps | | |
| May 30 – Jun 8 | Operation Reno$^{:146–7}$ | 2nd Battalion, 4th Marines reconnaissance in force | vicinity of Dong Ha, Quảng Trị Province | | |
| May 30 – Jun 9 | Operation Adelaide I | 1st Brigade, 1st Infantry Division search and destroy operation and security for repair of Route 16 | III Corps | | |
| May 31 | Operation Cheyenne II | 1st Battalion, 5th Marines search and destroy operation | I Corps | | |
| May 31 – Jun 8 | Operation Adelaide II | Search and destroy operation and cordon and search operation | Bình Dương Province | | |
| Jun – Aug | Operation Enogerra | 6th Battalion, Royal Australian Regiment search and clearance of Long Phouc village | Phước Tuy Province | | |
| Jun 1 – 6 | Operation Muskegon | 3rd Brigade, 1st Infantry Division search and destroy operation | Bình Dương Province | | |
| Jun 1 – 9 | Operation Beaver II | USMC search and destroy operation | I Corps | | |
| Jun 2 – 5 | Operation Lam Son 11 | 1st Squadron, 4th Cavalry and 7th Company, 7th ARVN Regiment operation | Bình Dương Province | | |
| Jun 2 – 21 | Operation Hawthorne/Operation Dan Tang 61 | 1st and 2nd Battalions, 327th Airborne Infantry Regiment, 2nd Battalion 502nd Airborne Infantry Regiment, 1st Battalion, 5th Cavalry Regiment and ARVN 42nd Regiment and 21st Ranger Battalion operation | Kon Tum Province | 688 plus further 506 estimated | 48 US, 10 ARVN |
| Jun 2 – Jul 13 | Operation El Paso II$^{:95}$ | 2nd Battalion, 18th Infantry Regiment, 2nd Battalion, 28th Infantry Regiment, 1st Squadron, 4th Cavalry Regiment and ARVN 5th Division operation against Vietcong 9th Division on Route 13 | near Minh Thanh in Bình Long Province | 855 | 47 |
| Jun 3 – Jul 3 | Operation Fort Smith | 1st Brigade, 25th Infantry Division search and destroy and pacification operations along Route 1 | Hậu Nghĩa Province | | |
| Jun 3 – 9 | Operation Makiki | 2nd Brigade, 25th Infantry Division and ARVN 49th Regiment search and destroy operation | Hậu Nghĩa Province | | |
| Jun 6 | Operation Muskegon (USMC) | 2nd Battalion, 2nd Marines search and destroy operation | I Corps | | |
| Jun 6 – 9 | Operation Joliet | 4th Battalion, 9th Infantry Regiment search and destroy operation | 6 km east of Cu Chi, III Corps | | |
| Jun 6 – 12 | Operation Apache | 2nd Battalion, 5th Marines search and destroy operation | Quảng Trị Province | | |
| Jun 6 – 20 | Operation Benning II | US security operation | II Corps | | |
| Jun 7 – 9 | Operation Adelaide III | Search and destroy operation and road clearing operation from Di An to Phước Vĩnh | Bình Dương Province | | |
| Jun 7 – 12 | Operation Thang Phong III | ARVN and CIDG operation | Pleiku Province | 135 | 20 |
| Jun 8 – 18 | Operation Hollandia | 173rd Airborne Brigade search and destroy operation | Long Hải peninsula, Phước Tuy Province | | |
| Jun 9 – 12 | Operation Florida | USMC search and destroy and operation | Thừa Thiên Province | | |
| Jun 9 – 21 | Operation Hooker I | 2/1 Cavalry reconnaissance and security operation along the Cambodian border | western Kon Tum and Pleiku Provinces | | |
| Jun 12 – 14 | Operation Fargo I | 1st Brigade, 25th Infantry Division search and destroy operation | Hậu Nghĩa Province | | |
| Jun 13 | Operation Mexicali | 1st Battalion, 5th Infantry Regiment search and destroy operation | Hậu Nghĩa Province | | |
| Jun 13 – Jul 4 | Operation Santa Fe (1966) | 1st Battalion, 27th Infantry Regiment search and destroy operation | Hậu Nghĩa Province | | |
| Jun 16 | Operation Longstreet | ROK 2nd Marine Brigade engineering security operation | Bình Định and Phú Yên Provinces | | |
| Jun 17 – 21 | Operation Helemano | 4th Battalion, 9th Infantry Regiment search and destroy operation | Hậu Nghĩa Province | | |
| Jun 17 – 23 | Operation Dodge$^{:149}$ | 2nd Battalion, 4th Marines search and destroy operation | Quảng Trị Province | | |
| Jun 18 – 30 | Operation Deckhouse I$^{:304}$ | BLT 3rd Battalion, 5th Marines operation in support of the 1st Cavalry Division's Operation Nathan Hale | Phú Yên Province | 400 | |
| Jun 19 – Jul 1 | Operation Nathan Hale | 1st Cavalry Division and 1st Brigade, 101st Airborne Division operation | vicinity of Dong Tre and Tuy Hòa, Phú Yên Province | 459 | 62 |
| Jun 21 – 24 | Operation Lam Son 283 | ARVN operation | Quảng Trị Province | 331 | 37 |
| Jun 23 – Jul 9 | Operation Yorktown | 173rd Airborne Brigade search and destroy operation | Xuân Lộc Province | | |
| Jun 24 – Jul 15 | Operation Beauregard | 1st Brigade, 101st Airborne Division security operation of the Cambodian and Laotian borders | Kon Tum and Pleiku Provinces | | |
| Jun 25 – Jul 1 | Operation Coco Palms | 1st Battalion, 5th Infantry Regiment search and destroy operation | northwest of Cu Chi in Bình Dương Province | 25 | |
| Jun 25 – Jul 2 | Operation Jay/Operation Lam Son 284$^{:150}$ | 2nd Battalion, 1st Marines, 2nd Battalion, 4th Marines and ARVN operation to engage the PAVN 806th and 812th Battalions, 6th Regiment that had recently moved into the Quảng Điền District between Route 1 and the South China Sea about 20 km north of Huế | Thừa Thiên Province | 54 | 6 |
| Jun 27 – Dec 1 68 | Operation Boone | MACV operation to develop a cross-border reconnaissance capability for Cambodia using Special Forces troops | Cambodia | | |
| Jun 29 – Jul 1 | Operation Oakland/Operation Lien Ket 46 | 2nd Battalion, 7th Marines, 3rd Battalion, 11th Marines, 2nd Battalion, ARVN 5th Regiment ARVN 37th Ranger Battalion search and destroy operation | Quảng Ngãi Province | | |
| Jun 30 – Jul 31 | Operation Benning III | 2/1 Cavalry security operation | Bình Định Province | | |
| Jul 1 – 6 | Operation Holt/Operation Lam Son 286 | 3rd Battalion, 4th Marines and ARVN search and destroy operation | Thừa Thiên Province | | |
| Jul 2 – 30 | Operation Henry Clay | 1st Cavalry Division and 2nd Battalion, 327th Airborne Infantry Regiment search and destroy operation in the Cambodian border area as a follow-up to Operation Nathan Hale | Bình Định, Phu Bon, Phú Yên, Pleiku and Darlac Provinces | | |
| Jul 2 – 31 | Operation Kahana | 25th Infantry Division search and destroy operation | Bình Tuy and Long Khánh Provinces | | |
| Jul 4 | Operation James Bond | 2/1 Cavalry counterintelligence operation | Bình Định Province | | |
| Jul 4 – 14 | Operation Sydney I | 5th Battalion, Royal Australian Regiment search and destroy operation | Phước Tuy Province | | |
| Jul 4 – Oct 27 | Operation Macon$^{:201–10}$ | 1st Battalion, 3rd Marines, 2nd Battalion, 3rd Marines, 3rd Battalion, 3rd Marines, 1st Battalion, 9th Marines, 2nd Battalion, 9th Marines and 3rd Battalion, 9th Marines search and destroy and security operation for the An Hoa industrial complex | Quảng Nam Province | 507 | 24 |
| Jul 5 | Operation Cuu Long 32/66 | ARVN operation | Kien Hoa Province | 155 | 4 |
| Jul 5 – 11 | Operation Binh Phu | ARVN operation | Bình Định Province | 137 | 15 |
| Jul 6 – 14 | Operation Washington$^{:211–3}$ | 1st Reconnaissance Battalion reconnaissance operation in the Do Xa region | Quảng Ngãi Province | 13 | |
| Jul 6 – 26 | Operation Springfield | 1st Battalion, 2nd Infantry Regiment search and destroy operation | III Corps | | |
| Jul 7 – Aug 3 | Operation Hastings/Operation Deckhouse II$^{:160–75}$ | 1st Battalion, 3rd Marines, 2nd Battalion, 4th Marines, 3rd Battalion 4th Marines, 3rd Battalion, 5th Marines, 3rd Battalion, 9th Marines, 3rd Battalion, 12th Marines, 1st Battalion, 1st Marines and 2nd Battalion, 1st Marines and ARVN operation against the PAVN 324B Division | Cam Lo area near the DMZ | 882 | 183 |
| Jul 8 – 12 | Operation Thăng Long 243 | ARVN operation | Darlac Province | 107 | 17 |
| Jul 8 – 13 | Operation Ewa | 1st Battalion, 27th Infantry Regiment search and destroy operation | Hậu Nghĩa Province | | |
| Jul 9 – 17 | Operation Aurora I | 173rd Airborne Brigade search and destroy operation | Long Khánh Province | | |
| Jul 9 – Aug | Operation Bun Kae 66-9 | ROK Capital Division operation | Pleiku Province | 106 | 7 |
| Jul 12 – Sep 3 | Operation El Paso III | 1st Brigade, 1st Infantry Division search and destroy operation | Binh Long and Phước Long Provinces | | |
| Jul 13 – 15 | Operation Fresno (Hậu Nghĩa) | 2nd Battalion, 27th Infantry Regiment search and destroy operation | Hậu Nghĩa Province | | |
| Jul 13 – 22 | Operation Kansas$^{:132}$ | III MAF operation which involved inserting a series of 13-man reconnaissance teams to observe and bring fire on the NVA and VC | Que Son Valley, Quang Tin and Quảng Nam Provinces | 85 | 9 |
| Jul 14 – 22 | Operation Mokuliea | 2nd Brigade, 25th Infantry Division search and destroy operation | Bình Dương and Hậu Nghĩa Provinces | | |
| Jul 15 – 23 | Operation Sydney II | 5th Battalion, Royal Australian Regiment search and destroy operation | Phước Tuy Province | | |
| Jul 16 | Operation Deckhouse II$^{:163}$ | 3rd Battalion, 5th Marines and HMM-363 operation in support of Operation Hastings | northeast of Dong Ha in Quảng Trị Province | | |
| Jul 16 – 18 | Operation Brisbane | 6th Battalion, Royal Australian Regiment operation | Phước Tuy Province | | |
| Jul 17 | Operation Lam Son 290 | ARVN operation | Quảng Trị Province | 135 | |
| Jul 17 – 22 | Operation Cedar Rapids I | 1st Battalion, 2nd Infantry Regiment and 1st Battalion, 26th Infantry Regiment search and destroy operation | Bình Dương Province | | |
| Jul 17 – Aug 1 | Operation Hayes | 3/1 Cavalry reconnaissance and screening mission along the Cambodian border west of Dak To and Dak Pek including surveillance of known and suspected infiltration routes | Kon Tum Province | | |
| Jul 17 – Aug 3 | Operation Aurora II | 173rd Airborne Brigade search and destroy operation | Phuong Lam Province | | |
| Jul 21 – Sep 4 | Operation John Paul Jones | 2nd Brigade, 4th Infantry Division, 1st Brigade, 101st Airborne Division and ROK 2nd Marine Brigade operation | 40 km west of Tuy Hòa, Phú Yên Province | 158 | 12 |
| Jul 20 | Operation Tally Ho | Air and naval gunfire interdiction of lines of communication | southern panhandle of North Vietnam | | |
| Jul 22 – 24 | Operation Cedar Rapids II | 1st and 2nd Battalions, 2nd Infantry Regiment search and destroy operation | Bình Dương Province | | |
| Jul 23 – Aug 6 | Operation Koko Head | 2nd Brigade, 25th Infantry Division search and destroy operation | Bình Dương and Hậu Nghĩa Provinces | 6 | |
| Jul 24 – 29 | Operation Hobart | 6th Battalion, Royal Australian Regiment search and destroy operation | | | |
| Jul 25 | Operation Steel Horse VII | 6th Battalion, 16th Field Artillery harassment and interdiction operation | Bình Định Province | | |
| Jul 26 – 29 | Operation Franklin/Operation Lien Ket 50 | 1st Battalion, 7th Marines, 2nd Battalion, 7th Marines and ARVN 2nd Division search and destroy operation | Quảng Ngãi Province | | |
| Jul 26 – Aug 1 | Operation Springfield II | 1st Battalion, 2nd Infantry Regiment search and destroy operation | III Corps | | |
| Jul 31 – Sep 2 | Operation Benning IV | 1/1 Cavalry security operation | Bình Định Province | | |
| Aug – Sep | Operation Blue Jay | II Field Force operation to support the deployment of the 196th Infantry Brigade to its base in Tây Ninh; the 25th Infantry Division was the sponsor, along with direct air force airlift from the port of Vũng Tàu to Tây Ninh, along with road convoys | | | |
| Jul 31 – Aug 25 | Operation Paul Revere II | 3rd Brigade 25th Infantry Division, 2/1 Cavalry, 3/1 Cavalry, ROKA, ARVN 23rd Division and ARVN 3rd Airborne Brigade search and clear operation | Pleiku Province | 620 | 68 |
| Aug 1 – 31 | Operation Oahu | 1st Brigade, 25th Infantry Division search and destroy operation | Tây Ninh Province | | |
| Aug 2 – 8 | Operation Bucks | 3rd Battalion, 1st Marines search and destroy operation 15 km south of Da Nang | Quảng Nam Province | | |
| Aug 2 – 14 | Operation Cheyenne (III Corps) | 2nd and 3rd Brigades, 1st Infantry Division road clearing and security operation along Route 13 | between Lai Khe and An Loc | | |
| Aug 3 – Jan 31 1967 | Operation Prairie$^{:177–98}$ | 1st Battalion, 3rd Marines, 2nd Battalion, 3rd Marines, 3rd Battalion, 3rd Marines, 1st Battalion, 4th Marines, 2nd Battalion, 4th Marines, 3rd Battalion, 4th Marines, 2nd Battalion, 5th Marines, 2nd Battalion, 7th Marines, 3rd Battalion, 7th Marines, 2nd Battalion, 9th Marines and 1st and 3rd Battalions, 26th Marines search and destroy operation against the PAVN 324B Division in the hills at Con Thien/Gio Linh areas south of the DMZ at Mutter's Ridge, the Razorback, Hill 400, Hill 484 and The Rockpile | DMZ | 1397 | 200 |
| Aug 4 – 30 | Operation Seamont | 26th Marines search and destroy operation | Phú Quốc Island | | |
| Aug 6 – 21 | Operation Colorado/Operation Lien Ket 52$^{:214–20}$ | 1st Battalion, 5th Marines, 2nd Battalion, 5th Marines and 3rd Battalion, 5th Marines, 1st, 3rd and 4th Battalions Republic of Vietnam Marine Corps and ARVN 35th and 39th Ranger Battalions search and destroy operation to locate and destroy the PAVN 2nd Division (AKA 620th Division) | Que Son Valley, Quảng Nam and Quảng Tín Provinces | 674 | 22 |
| Aug 7 – 18 | Operation Holsworthy | 5th Battalion, Royal Australian Regiment operation to reclaim the village of Binh Ba | Phước Tuy Province | | |
| Aug 7 – Sep 1 | Operation Lahaina | 2nd Battalion, 27th Infantry Regiment pacification operation | Hậu Nghĩa Province | | |
| Aug 8 – Sep 1 | Operation Aiea | 2nd Brigade, 25th Infantry Division search and destroy operation | Hậu Nghĩa Province | | |
| Aug 10 – 12 | Operation Wilcox | 1st Battalion, 9th Marines search and destroy operation | Quảng Nam Province | | |
| Aug 9 – Sep 7 | Operation Toledo | 173rd Airborne Brigade, 2nd Battalion, 18th Infantry Regiment, BLT 1st Battalion, 26th Marines, 1st Australian Task Force and ARVN 33rd and 35th Ranger Battalions multi-battalion search and destroy operation in the May Tao Secret Zone. The deserted headquarters area for the VC 5th Division was located and destroyed along with vast amounts of supplies | Long Khánh, Bình Tuy and Phước Tuy Provinces | 11 | |
| Aug 10 – Oct 10 | Operation Stable | 1st Logistical Command movement of the ROK 9th Division from Nha Trang to Tuy Hòa | | | |
| Aug 11 – Apr 1967 | Operation Pink Rose | ARPA, US Forest Service and USAF operational testing of techniques to dry out and start forest fires | Tây Ninh and Phước Long Provinces | | |
| Aug 12 – 14 | Operation El Dorado | 1st Brigade, 1st Infantry Division search and destroy operation | Bình Định Province | | |
| Aug 13 – 21 | Operation Suwannee | 1st Battalion, 9th Marines and 3rd Battalion, 9th Marines search and destroy operation | Quảng Nam Province | | |
| Aug 15 – 17 | Operation Belfast | 1st Infantry Division search and destroy operation | Bình Dương Province | | |
| Aug 15 – 19 | Operation Gallup | US search and destroy operation | III Corps | | |
| Aug 16 – 18 | Operation Smithfield | 6th Battalion, Royal Australian Regiment operation in response to VC mortar fire developed into a battle against the VC 275th Regiment | Long Tan | 245 | 18 |
| Aug 16 – 29 | Operation Deckhouse III$^{:305}$ | SLF 1st Battalion, 26th Marines and the 173rd Airborne Brigade joint operation | Vũng Tàu peninsula, Bình Tuy Province | 2 | 4 |
| Aug 18 – 20 | Operation Broome | US search and destroy operation | III Corps | | |
| Aug 18 – 20 | Operation Brown | 1st Battalion, 1st Marines, 2nd Battalion, 1st Marines and ARVN 51st Regiment search and destroy operation | Quảng Nam Province | | |
| Aug 18 – 20 | Operation Quang Dien | ARVN search and clear operation | Thừa Thiên Province | 100 | 21 |
| Aug 19 – 22 | Operation Castine | 2nd Brigade, 1st Infantry Division search and destroy operation | Bình Dương Province | | |
| Aug 20 – 22 | Operation Ottawa | 3rd Battalion, 4th Marines search and destroy operation | Thừa Thiên Province | | |
| Aug 20 – 29 | Operation Allegheny | 3rd Marines search and destroy operation | 22 km southwest of Da Nang in Quảng Nam Province | 113 | 7 |
| Aug 23 – Sep 2 | Operation Amarillo | 1st Brigade, 1st Infantry Division mine-clearing operation | Phu Loi area of Bình Dương Province | | |
| Aug 23 – Sep 23 | Operation Pole Star | ROK 2nd Marine Brigade clear and search operation | Bình Sơn District, Quảng Ngãi Province | | |
| Aug 23 – Sep 26 | Operation Mallard II | Deployment of 2nd Battalion, 34th Armored Regiment from Vũng Tàu to Long Binh | | | |
| Aug 25 – 27 | Operation Long Phi 984 | ARVN search and destroy operation | Kiên Giang Province | 132 | 30 |
| Aug 26 – 31 | Operation Darlinghurst | 5th Battalion, Royal Australian Regiment clearing operation following 6 RAR's action at Long Tan | Phước Tuy Province | | |
| Aug 26 – Sep 6 | Operation Pawnee | 3rd Battalion, 4th Marines search and destroy operation | Thừa Thiên Province | | |
| Aug 26 – Jan 20 68 | Operation Byrd | 1st Cavalry Division economy-of-force operation | Bình Thuận Province | | |
| Aug 27 – 29 | Operation Jackson/Operation Lien Ket 54 | 3rd Battalion, 5th Marines, 3rd Battalion, 7th Marines and ARVN 4th Regiment search and destroy operation | Quảng Ngãi Province | | |
| Aug 31 – Sep 12 | Operation Kipapa | 1st Brigade, 25th Infantry Division operation | Filhol Plantation, Hậu Nghĩa Province | 8 | 6 |
| Sep 1 – 4 | Operation Troy$^{:54}$ | 2nd Battalion, 1st Marines search and destroy operation | Quảng Nam Province | | |
| Sep 1 – Oct 11 | Operation Sunset Beach | 2nd Brigade, 25th Infantry Division search and destroy operation | Hậu Nghĩa Province | | |
| Sep 1-Nov 1 | Operation Duke | 84th Engineer Battalion (Construction), 19th Engineer Battalion (Combat), 509th Engineer Company (Panel Bridge), 553rd Engineer Company (Floating Bridge), 554th Engineer Company (Floating Bridge), 513th Engineer Company (Dump Truck), 585th Engineer Company (Dump Truck), 630th Engineer Company (Light Equipment) | Binh Dinh Province | | |
| Sep 2 – 6 | Operation Dan Chi 261 | ARVN operation | An Xuyen and Bạc Liêu Provinces | | 21 |
| Sep 2 – 29 | Operation Benning V | 3/1 Cavalry security operation | Bình Định Province | | |
| Sep 3 | Operation Decatur | 1st Battalion, 26th Infantry Regiment security operation | Quon Loi – An Loc | | |
| Sep 4 – 6 | Operation Cranston | 1st Battalion, 16th Infantry Regiment security and resupply operation | between Lai Khe and Phu Loi | 52 | 2 |
| Sep 4 – 15 | Operation El Paso | 1st Battalion, 5th Marines, 2nd Battalion, 5th Marines and ARVN 2nd, 3rd and 4th Battalions, 6th Regiment search and destroy operation | Quảng Tín Province | | |
| Sep 4 – 15 | Operation Napa/Operation Lien Ket 56 | 1st Battalion, 5th Marines, 3rd Battalion, 5th Marines and 2nd, 3rd, 4th Battalions, ARVN 6th Regiment search and destroy operation | Quảng Tín Province | | |
| Sep 4 – Oct 8 | Operation Baton Rouge | 1st Battalion 18th Infantry search and destroy operation | Rung Sat Special Zone | | |
| Sep 4 – Oct 25 | Operation Seward | 1st Brigade, 101st Airborne Division and 1st Battalion, 22nd Infantry Regiment search and destroy and security operation | Phú Yên Province | 347 | 27 |
| Sep 5 – 29 | Operation Meadowlark | Deployment of 11th Armored Cavalry Regiment from Vũng Tàu to Long Binh | | | |
| Sep 6 – 9 | Operation Manh Ho | ARVN operation | Bình Định Province | 147 | |
| Sep 6 – 12 | Operation Bangor | 2nd Battalion, 26th Infantry Regiment search and destroy operation | Bình Dương Province | | |
| Sep 7 – 12 | Operation Cannon | 2nd Battalion, 1st Marines and 3rd Battalion, 9th Marines search and destroy operation | Quảng Nam Province | | |
| Sep 8 | Operation Seaside | 3rd Battalion, 1st Marines search and destroy operation | Quảng Nam Province | | |
| Sep 8 – 9 | Operation Wilton | US search and destroy operation | III Corps | | |
| Sep 8 – 14 | Operation Pawnee II | 3rd Battalion, 4th Marines search and destroy operation | Thừa Thiên Province | | |
| Sep 8 – 16 | Operation Fresno (Quảng Ngãi) | 1st Battalion, 7th Marines search and destroy operation | Quảng Ngãi Province | | |
| Sep 8 – 24 | Operation Vaucluse | 5th Battalion, Royal Australian Regiment and 6th Battalion, Royal Australian Regiment search and destroy operation | Phước Tuy Province | | |
| Sep 13 – 22 | Operation Atlantic City | 3rd Brigade, 1st Infantry Division, 25th Infantry Division and 173rd Airborne Brigade search and destroy operation | Bình Dương Province | | |
| Sep 13 – Oct 2 | Operation Oliver Wendell Holmes | 1/1/ Cavalry, 2/1 Cavalry and ARVN 3rd Airborne Brigade search and destroy operation | | | |
| Sep 13 – Oct 30 | Operation Thayer I | 1st Cavalry Division, ARVN 3rd Airborne Battalion and ARVN 41st Regiment operation | Bình Định Province | 232 | 30 |
| Sep 14 – Nov 25 | Operation Attleboro$^{:30}$ | 196th Infantry Brigade, 1st Infantry Division and 4th Infantry Division and 173rd Airborne Brigade operation | War Zone "C" of Tây Ninh Province | 1,062 | 115 |
| Sep 14 – Feb 13 1967 | Operation Lanikai | 1st Brigade, 25th Infantry Division pacification operation | Long An Province | | |
| Sep 15 – 21 | Operation Danbury | 1st Battalion, 16th Infantry Regiment and 2nd Battalion, 28th Infantry Regiment search and destroy operation | 10 km west of Lai Khe, III Corps | | |
| Sep 15 – 24 | Operation Deckhouse IV$^{:188}$ | SLF 1st Battalion, 26th Marines and 3rd Marine Reconnaissance Battalion operation as an adjunct to Operation Prairie | 12 km northeast of Dong Ha in I Corps | 200 | 36 |
| Sep 15 – Oct 9 | Operation Sioux City | 173rd Airborne Brigade Combat Team search and destroy operation | Xom Cat, Biên Hòa Province | | |
| Sep 15 – Nov 14 | Operation Kalihi | 1st Brigade, 25th Infantry Division operation | Filhol Plantation in Hậu Nghĩa Province | 4 | |
| Sep 16 – 27 | Operation Golden Fleece 7-1/Operation Lien Ket 60$^{:236}$ | 1st Battalion, 7th Marines and ARVN 4th Regiment operation to protect rice harvest | Mộ Đức District | | |
| Sep 16 – Oct 19 | Operation Wren | Deployment of the Philippine Civil Action Group from Cam Ranh Bay to Tây Ninh Province | | | |
| Sep 19 – Oct 4 | Operation Kamuela | 1st Brigade, 25th Infantry Division search and destroy operation | Boi Loi Woods and Ben Cui Plantation, Bình Dương Province | 13 | 5 |
| Sep 20 – 22 | Operation Huntsville | 3rd Brigade, 1st Infantry Division and ARVN 48th Regiment search and destroy operation | III Corps | | |
| Sep 22 – 28 | Operation Binh Phu 27 | ARVN operation | Bình Định Province | | |
| Sep 23 – Oct 1 | Operation Longview | 1st Brigade, 1st Infantry Division route security and clearing operation on Route 16 | between Phuoc Vinh and Biên Hòa | | |
| Sep 23 – Oct 30 | Operation Mang Ho VI | ROKA Capital Division search and destroy operation | Bình Định Province | 1161 | 30 |
| Sep 24 | Operation Coffee | 2nd Battalion, 1st Marines search and destroy operation | Quảng Nam Province | | |
| Sep 25 | Operation Boyd | 2nd Battalion, 28th Infantry search and destroy operation | Bình Dương Province | | |
| Sep 28 – 29 | Operation Monterey | 1st Battalion, 5th Marines and 2nd Battalion, 5th Marines search and destroy operation | Quảng Tín Province | | |
| Sep 28 – 30 | Operation Kathy | ARVN 2nd and 8th Airborne Battalions search and destroy operation | Capital Military District | | |
| Sep 29 – Oct 11 | Operation Benning VI | 2/1 Cavalry security operation | Bình Định Province | | |
| Sep 30 – Oct 3 | Operation Crowsnest$^{:167}$ | 5th Battalion, Royal Australian Regiment operation for the assistance for the village of Duc Thanh | Phước Tuy Province | | |
| Sep 30 – Oct 2 | Operation Monterey II | 1st Battalion, 5th Marines and 2nd Battalion, 5th Marines security operation | Quảng Tín Province | | |
| Oct | Operation Traffic Cop | Initial phase of Operation Sea Dragon | | | |
| Oct 1 | Operation Dazzlem (1966) | 1st Cavalry Division and 173rd Airborne Brigade security operation | Bình Định Province | | |
| Oct 1 – 4 | Operation Little Rock | 1st Brigade, 1st Infantry Division and ARVN 48th Regiment search and destroy operation | Phước Long Province | | |
| Oct 1 – 25 | Operation Kern | 2nd Battalion, 3rd Marines search and destroy operation | Quảng Ngãi Province | | |
| Oct 2 – 24 | Operation Irving/Operation Dai Bang 800/Operation Mang Ho 6$^{:24–9}$ | 1st Cavalry Division, ROK Capital Division and ARVN 22nd Division operation against the PAVN 610th Division | Bình Định Province | 681 | 29 |
| Oct 2 – 27 | Operation Bathurst | 5th Battalion, Royal Australian Regiment and 6th Battalion, Royal Australian Regiment search and destroy operation | Phước Tuy Province | | |
| Oct 3 – 10 | Operation Decatur II | 1st Infantry Division security operation | III Corps | | |
| Oct 3 – 10 | Operation Lee/Operation Lien Ket 64 | ROK 2nd Marine Brigade and ARVN 4th Regiment operation | Quảng Ngãi Province | | |
| Oct 3 – Nov 20 | Operation Lam Son 318 | ARVN operation | Quảng Trị Province | 179 | 38 ARVN, 1 US |
| Oct 6 – 10 | Operation Canberra | 5th Battalion, Royal Australian Regiment search and destroy operation, reinforced with an APC squadron, to assist in securing Route 15 in the 1st Australian Task Force TAOR in support of the receipt and initial positioning of the 3rd Brigade, 4th Infantry Division at Bear Cat | | | |
| Oct 6 – 15 | Operation Hickory (Biên Hòa) | 3rd Squadron, 11th Armored Cavalry Regiment search and destroy operations | Biên Hòa Province | | |
| Oct 8 – 15 | Operation Kent | 2nd Battalion, 7th Marines search and destroy operation | Quảng Ngãi Province | | |
| Oct 8 – 16 | Operation Tulsa | 1st Infantry Division and 5th Division road clearing operation along Route 13 between Phu Cuong and An Lộc | Bình Dương and Bình Long Provinces | | |
| Oct 8 – Dec 4 | Operation Winchester | 4th Battalion, 503rd Airborne Infantry Regiment search and destroy operation to relieve the 2nd Battalion, 26th Marines and to occupy and maintain control of an assigned sector of the Da Nang TAOR | Da Nang | | |
| Oct 11 – 16 | Operation Robin | 5th Battalion, Royal Australian Regiment and 173rd Airborne Brigade operation to receive the 3d Brigade, 4th Infantry Division at the ports of Saigon and Vũng Tàu, and to safeguard the transport to, and initial occupation of, the designated brigade base camp at Ben Cat in Bình Dương Province. A full examination of the area was cut short as 5RAR was required for road security on Route 15 while the 196th Infantry Brigade moved from Vũng Tàu to Long Binh | | | |
| Oct 11 – 20 | Operation Teton | 3rd Battalion, 1st Marines search and destroy operation | Quảng Nam Province | | |
| Oct 11 – Nov 14 | Operation Kailua | 2nd Brigade, 25th Infantry Division operation | Hậu Nghĩa Province | 67 | 5 |
| Oct 11 – Nov 17 1967 | Operation Uniontown (1966-67) | 173d Airborne Brigade, 199th Light Infantry Brigade and 11th Armored Cavalry Regiment security and defence operations | around Long Binh | | |
| Oct 16 | Operation Cuu Long 22/KT | ARVN operation | Dinh Tuong Province | 14 | |
| Oct 16 – 17 | Operation Craddock | US search and destroy operation | III Corps | | |
| Oct 16 – Dec 3 | Operation Leeds | 3rd Brigade, 1st Infantry Division search and destroy operation | | |
| Oct 17 – 26 | Operation Queanbeyan | 5th Battalion, Royal Australian Regiment search and destroy operation in AO Gold, a 14 square km area including Nui Thi Vai and the region north and west of it | Phước Tuy Province | | |
| Oct 18 – 20 | Operation Dan Chi 263 | ARVN operation | Chuong Tien Province | 138 | 29 ARVN, 1 US |
| Oct 18 – 30 | Operation Dover | 1st Battalion, 5th Marines search and destroy operation | Quảng Tín Province | | |
| Oct 18 – Dec 31 | Operation Paul Revere IV | 2nd Brigade, 4th Infantry Division, 2nd and 3rd Brigades, 25th Infantry Division and 2/1 Cavalry search and destroy operation along the Cambodian border | western II Corps | 962 | 136 |
| Oct 18 – Feb 1 1967 | Operation Duck | 9th Infantry Division movement from Vũng Tàu to Bear Cat | | | |
| Oct 19 – Dec | Operation Atlanta$^{:74}$ | 11th Armored Cavalry Regiment mission to clear and secure lines of communication in three provinces near Saigon and to secure the new Blackhorse Base Camp | 13 km south of Xuan Loc | 131 | 8 |
| Oct 20 – 24 | Operation Bethlehem | 2nd Brigade, 1st Infantry Division search and destroy operation | Bình Dương Province | | |
| Oct 21 – 23 | Operation Madison | 3rd Battalion, 1st Marines search and destroy operation | Quảng Nam Province | | |
| Oct 21 – Nov 5 | Operation Allentown/Lam Son II South | 2nd Brigade, 1st Infantry Division search and destroy operation | Biên Hòa, Bình Dương and Gia Định Provinces | | |
| Oct 25 – Nov 28 | Operation Bremerton | 3rd Battalion, 22nd Infantry Regiment search and destroy operation | Rung Sat Special Zone | | |
| Oct 30 – Dec 4 | Operation Geronimo | Company C, 1st Battalion, 327th Infantry Regiment, 1st Brigade, 101st Airborne Division search operation | Phú Hiệp | 118 | 15 |
| Oct 24 – Feb 11 1967 | Operation Thayer II | 1st Cavalry Division, 25th Infantry Division and Republic of Vietnam Marine Corps operation in the coastal plains and the Kim Son and Soui Ca Valleys | western Bình Định Province | 1,667 | 193 |
| Oct 25 – Apr 2 1967 | Operation Adams | 1st Brigade, 4th Infantry Division, 1st Brigade, 101st Airborne Division and ARVN 47th Regiment operation to protect rice harvest | Phú Yên Province | 491 | 51 |
| Oct 25 – Oct 31 1968 | Operation Sea Dragon | US Navy and Royal Australian Navy interdiction of sea lines of communication and supply from North Vietnam to South Vietnam | | | 5 |
| Oct 29 – Dec 24 | Operation Pawnee III$^{:224}$ | 2nd Battalion, 26th Marines search and destroy operation | Thừa Thiên Province | | |
| Oct 30 – 31 | Operation Bundaberg | 5th Battalion, Royal Australian Regiment and 6th Battalion, Royal Australian Regiment cordon and search operation | near Hoa Long in Phước Tuy Province | | |
| Oct 31 | Operation Travis | 2/1 Cavalry emergency deployment to support Operation Paul Revere IV | | | |
| Nov – Jan 1970 | Operation Stable Door | US Navy defence of allied shipping against VC attacks | | | |
| Nov 5 – 8 | Operation Lien Ket 68 | ARVN search and destroy operation | Quảng Tín Province | 109 | 64 |
| Nov 5 – 19 | Operation Shasta | 2nd Battalion, 1st Marines, 2nd Battalion, 3rd Marines and 1st Battalion, 26th Marines search and destroy operation | Quảng Nam Province | | |
| Nov 6 – 7 | Operation Yass | 5th Battalion, Royal Australian Regiment cordon and search of Phuoc Hoa village and the clearance of Long Sơn Island | Phước Tuy Province | | |
| Nov 8 – 12 | Operation Hayman | 3rd Squadron SAS and 5th Battalion, Royal Australian Regiment operation as a search and clear mission to round up VC who had infiltrated the fishing village on Long Sơn Island | Long Sơn Island | | |
| Nov 8 – 14 | Operation Arcadia | 1st Battalion 1st Marines and 3rd Battalion 1st Marines search and destroy operation | Quảng Nam Province | | |
| Nov 9 – 27 | Operation Dragon Eye | ROK 2nd Marine Brigade search and destroy operation | Quảng Ngãi Province | 154 | 38 ROK, 4 US |
| Nov 16 – Jan 12 67 | Operation Dan Tam 81 | 11th Armored Cavalry Regiment and ARVN 10th Division rice harvest security operation | Bình Tuy and Long Khánh Provinces | | |
| Nov 18 – Dec 3 | Operation Ingham | 5th Battalion, Royal Australian Regiment and 6th Battalion, Royal Australian Regiment search and destroy operation | Xuyên Mộc District | | |
| Nov 19 – 27 | Operation Lien Ket 70 | ARVN 2nd Division search and destroy operation | Quảng Ngãi Province | 123 | 3 |
| Nov 18 – May 14 67 | Operation Fort Nisqually | 3rd Brigade, 4th Infantry Division deployment from Bear Cat to Dầu Tiếng District and search and destroy operations | Bình Dương Province | | |
| Nov 20 – 27 | Operation Rio Blanco/Operation Lien Ket 70 | 1st Battalion, 7th Marines and ARVN search and destroy operation | Quảng Ngãi Province | | |
| Nov 20 – 27 | Operation Rio Grande/Operation Lien Ket 81 | 1st Battalion, 5th Marines, ROK 2nd Marine Brigade and ARVN 2nd Division search and destroy operation | Quảng Ngãi Province | | |
| Nov 24 – Dec 2 | Operation Waco | 1st Battalion, 503rd Airborne Infantry Regiment search and destroy operation | Biên Hòa Province | | |
| Nov 25 – Dec 9 | Operation Bismark | 1st Brigade, 1st Infantry Division search and destroy and road clearing operation along Route 16 | between Phuoc Vinh and Dĩ An District | | |
| Nov 27 – Dec 23 | Operation Charleston | 2nd Battalion, 18th Infantry Regiment search and destroy operation | Rung Sat Special Zone | | |
| Nov 29 – Dec 5 | Operation Healdsburg | 3rd Brigade, 1st Infantry Division search and destroy operation | III Corps | 113 | |
| Nov 29 – Dec 7 | Operation Mississippi | 2nd Battalion, 5th Marines search and destroy operation | Quảng Nam Province | | |
| Nov 30 – Dec 6 | Operation Sutter | 1st Battalion, 5th Marines search and destroy operation | Quảng Tín Province | | |
| Nov 30 – Dec 14 67 | Operation Fairfax/Operation Rang Dong$^{:134}$ | 1 Battalion from each of the 1st Infantry Division, 4th Infantry Division, 25th Infantry Division, 196th Infantry Brigade, ARVN 5th Division and ARVN Rangers operation | Saigon Capital Military District and Gia Định Province | 1,043 | 179 |
| Dec | Operation Boulder | 1st Battalion, 26th Infantry Regiment search and destroy operation | | | |
| Dec 4 – 5 | Operation Alexandria | 11th Armored Cavalry Regiment operation | Duc Thanh Province and Xuân Lộc District | | |
| Dec 4 – 14 | Operation Canary | 1st Australian Task Force and 173rd Airborne Brigade two phase highway security operation along Route 15 from Phú Mỹ to Long Binh and from Phú Mỹ to Bear Cat for elements of the 199th Light Infantry Brigade and the 9th Infantry Division | | | |
| Dec 6 – 7 | Operation Trinidad | 1st Battalion, 1st Marines search and destroy operation | Quảng Nam Province | | |
| Dec 8 – Jan 19 1967 | Operation Pickett | 1st Brigade, 101st Airborne Division search and destroy operation | Kon Tum Province | 62 | 20 |
| Dec 7 – 11 | Operation Trinidad II | 1st Battalion, 1st Marines search and destroy operation | Quảng Nam Province | | |
| Dec 7 – 12 | Operation Cortez | 3rd Battalion, 5th Marines search and destroy operation | Quảng Tín Province | | |
| Dec 10 – Jan 12 67 | Operation Blackjack 22 | Special Forces Detachment B-50 Project OMEGA and Mobile Guerilla Force 768 operation | western Darlac Province | | |
| Dec 11 – 16 | Operation Sterling | 3rd Battalion, 9th Marines search and destroy operation | Quảng Nam Province | | |
| Dec 12 – Jan 21 1967 | Operation Sierra | 2nd Battalion, 7th Marines search and destroy operation | Quảng Ngãi Province | | |
| Dec 16 – 26 | Operation Initiator | 199th Infantry Brigade search and destroy operation | Long Binh Province | | |
| Dec 17 – 21 | Operation Glenn | 3rd Battalion, 1st Marines search and destroy operation | Quảng Nam Province | | |
| Dec 19 – 21 | Operation Shasta II | 1st Battalion, 1st Marines search and destroy operation | Quảng Nam Province | | |
| Dec 19 – 22 | Operation Santa Cruz | 1st Infantry Division cordon and search operation | Bình Dương Province | | |
| Dec 20 – Feb 16 67 | Operation Chinook I$^{:224}$ | 4th Marines operation | Thừa Thiên Province | 218 | |
| Dec 24 | Operation Little Sheba | 1st Brigade, 1st Infantry Division route and convoy security operation | Biên Hòa Province | | |
| Dec 27 – 30 | Operation Dan Chi 270D | US and ARVN search and destroy operation | Chuong Tien Province | 124 | 2 US |
| Dec 27 – 31 | Operation Wiggins | 2nd Battalion, 3rd Infantry Regiment search and destroy operation | Biên Hòa Province | | |