22nd Marine Regiment ( United States ) The 22nd Marine Regiment ( 22nd Marines ) is an inactive United States Marine Corps infantry regiment . The 22nd Marines was activated in June 1942 during World War II . The Marine regiment was under the command of a Task Force , the 1st Provisional Marine Brigade , and the 6th Marine Division , fighting in the battles of Eniwetok , Guam , and Okinawa . The regiment served in Northern China following the war and were subsequently deactivated in March 1946 . The 22nd Marines was reactivated at Marine Corps Base Quantico , Virginia in 1947 and was fully deactivated in October 1949 . Regiment components . The 22nd Marine Regiment was composed of three infantry battalion s and one headquarters battalion . The 22nd Marines initially also had a " 2nd Separate Howizer Battalion " which would eventually become a battalion within the 15th Marine Regiment of the 6th Marine Division upon its formation . History . Activation . The 22nd Marine Regiment was activated on June 1 , 1942 at Camp Elliot in San Diego , California ( Linda Vista tent area ) — the first infantry regiment ( Regimental Combat Team ) designated as an " independent " unit after the start of World War II . On June 18 , the 22nd Marines embarked for the Pacific theater , where the regiment was used for island defense while doing small unit training for about a year and a half — first in the jungles of western Samoa and then beginning in November 1943 , Maui , Hawaii and Wallis Island — before seeing combat in February 1944 . Marshall Islands : Battle of Eniwetok . On February 18 , 1944 , the 22nd Marines under the command of Colonel John T . Walker , participated in the Battle of Eniwetok , in the northwest area of the Marshall Islands , capturing the islands of Engebi in 6 hours , Eniwetok Atoll on February 21 with the 1st and 3rd Battalions of the 106th Infantry Regiment of the 27th Infantry Division , and Parry on February 22 . The 22nd Marine proceeded to take Kwajalein and Roi - Namur from March 7 to April 5 . This was the first Marine Corps unit to formally employ fire team tactics in combat . On April 6 , the Marine regiment was sent to Guadalcanal for rest , replacements , and further training . Southern Solomon Islands , Guadalcanal . 1st Provisional Marine Brigade . It was discovered on Guadalcanal that some 1800 + members of the 22nd Marines had been infected while they were training in Samoa in 1942 and 1943 with the slow manifesting tropical disease Filariasis , which causes Elephantiasis . The Marine regiment was replaced with 500 Marines and Navy corpsmen that were excess with the 3rd Marine Division and replacements from the United States . This greatly reduced the number of experienced Marines , corpsmen , and leaders within the regiment just prior to the Battle of Guam in July . For the invasion of the Island of Guam , the 4th Marine Regiment , 22nd Marine Regiment , and the Army ' s 305th Infantry Regiment , formed the core of the 1st Provisional Marine Brigade which was reactivated on April 18 , 1944 , on Guadalcanal . Mariana Islands : Battle of Guam . On July 21 , 1944 , the 1st Provisional Marine Brigade assaulted and landed south of the Orote Peninsula on Guam , the largest island of the Mariana Islands . The 3rd Marine Division landed north of the peninsula . The 1st Battalion , 22nd Marines landed on Beach Yellow 1 which was just north of the City of Agat , 2nd Battalion , 22nd Marines came ashore on Yellow 2 , and the 3rd Battalion , 22nd Marines held in reserve landed on Yellow 1 . In about 20 days of fighting the island was declared free of organized resistance . On August 23 , the 4th and 22nd Marine Regiments sailed back to Guadalcanal . Guadalcanal . 6th Marine Division . The 1st Provisional Marine Brigade was disbanded in September 1944 on Guadalcanal . The 4th Marines , 22nd Marines , and the 1st Battalion , 29th Marines along with supporting units and the 2nd and 3rd Battalions , 29th Marines from the United States were joined in September to form the 6th Marine Division on Guadalcanal which was activated on September 25 . Ryukyu Islands ( Japan ) : Battle of Okinawa . On April 1 , 1945 , during the invasion of Okinawa , the 22nd Marines landed on Green Beach where they secured the left flank of the landing force . Following the landing they pushed north with the rest of the 6th Marine Division and secured the northern portion of the island . On 13 April , the 2nd Battalion , 22nd Marines reached Hedo - Misaki at the northernmost tip of the island . They were eventually pulled down south and placed in the line to the right of the 1st Marine Division where they would eventually secure the city of Naha while taking very heavy casualties . On May 16 , the 22nd Marines was ordered to capture Sugar Loaf Hill which was captured with the 29th Marines in two days . After the fighting on Okinawa on June 21 , the 22nd Marines was moved to Guam to rest and refit . Northern China . While recuperating on Guam , the war ended on September 2 , 194 . The 22nd Marines received a warning order for it to prepare to move to China . The entire 6th Marine Division was sent to Northern China with the main mission of accepting the surrender of Japanese forces there and helping to repatriate those soldiers and other Japanese nationals back to Japan . The 22nd Marines landed in Tsingtao on October 11 , 1945 and were still there on March 26 , 1946 when the 6th division was officially deactivated . Reactivation & deactivation . The 22nd Marines was reactivated as School Demonstration Troops at Marine Corps Schools , Quantico , Virginia , on 1 September 1947 . Among its duties was training new Marine Corps Officers at The Basic School , Quantico , VA . The regiment was fully deactivated on 17 October 1949 . Medal of Honor recipients . Three Marines and one Navy corpsman who was assigned to the 22nd Marines were awarded the Medal of Honor : Posthumous Unit decorations & other awards . A unit citation or unit commendation are unit decorations bestowed upon an organization for the action cited . Members of the unit who participated in said actions are allowed to wear the appropriate unit award ribbon on their uniforms . Members of the 22nd Marine Regiment are entitled to the following service ribbons in the order of precedence :