List of most lethal American battles

Table columns:
Battle, siege, or offensive
Conflict
Date
Estimated number killed
Opposing force
References

Table rows:
cells: Battle of Normandy / Northern France
World War II
1944–06-06 !June 6 to September 14, 1944
34,137 killed[A 3]
Germany
[8]
cells: Meuse-Argonne Offensive
World War I
1918–09-26 !September 26 to November 11, 1918
26377 !26,277 killed
Germany
[9]
cells: Battle of Okinawa
World War II
1945–04-01 !April 1 to June 22, 1945
20195 !20,195 killed
Japan
[10]
cells: Battle of the Bulge
World War II
1944–12-16 !December 16, 1944, to January 25, 1945
19276 !19,276 killed
Germany
[11]
cells: Battle of Hürtgen Forest
World War II
1944–09-19 !September 19, 1944, to February 10, 1945
Over 12,000~ killed
Germany
[A 4]
cells: Battle of Luzon
World War II
1945–01-09 !January 9 to August 15, 1945
10640 !10,640 killed
Japan
[12]
cells: Battle of Côte d'Azur / Southern France
World War II
1944-08-15 !August 15 to September 14, 1944
7,301 killed
Germany
[1]
cells: Battle of Guadalcanal
World War II
1942–08-07 !August 7, 1942, to February 9, 1943
7100 !7,100 killed
Japan
[13]
cells: Battle of Gettysburg
American Civil War
1863–07-06 !July 1 to July 3, 1863
7,058 killed[A 5]
Confederacy
[14]
cells: Operation Nordwind
World War II
1944–12-31 !December 31, 1944, to January 25, 1945
7,000 killed[15]
Germany
[15]
cells: Battle of Iwo Jima
World War II
1945–02-16 !February 16 to March 26, 1945
6,821 killed
Japan
[16]
cells: Lorraine Campaign
World War II
1944–09-01 !September 1 to December 18, 1944
6,657 killed
Germany
[17]
cells: Battle of Anzio
World War II
1944–01-22 !January 22 to June 5, 1944
5,538 killed
Germany
[8]
cells: Seven Days Battles
American Civil War
1862–06-25 !June 25 to July 1, 1862
5,228 killed[A 6]
Confederacy
[6]
cells: Battle of Pusan Perimeter
Korean War
1950–08-04 !August 4 to September 18, 1950
4,599 killed
North Korea
[18]
cells: Chinese Second Phase Offensive in North Korea
Korean War
1950–11-25 !November 25 to December 15, 1950
4,538 killed[A 7]
China
[19]
cells: Battle of Spotsylvania
American Civil War
1864–05-08 !May 8 to May 21, 1864
4,240 killed[A 8]
Confederacy
[20]
cells: Battle of Chickamauga
American Civil War
1863–09-19 !September 19 to September 20, 1863
3,968 killed[A 9]
Confederacy
[20]
cells: Battle of the Wilderness
American Civil War
1864–05-05 !May 5 to May 7, 1864
3,741 killed[A 10]
Confederacy
[20]
cells: Battle of Antietam
American Civil War
1862–09-17 !September 17, 1862
3,654 killed[A 11]
Confederacy
[20]
cells: Battle of Leyte
World War II
1944–10-17 !October 17-December 26, 1944
3,593 killed
Japan
[A 12]
cells: Battle of Shiloh
American Civil War
1862–04-06 !April 6 to April 7, 1862
3,482 killed[A 13]
Confederacy
[20]
cells: Battle of Saipan
World War II
1944–06-15 !June 15 to July 9, 1944
3,426 killed
Japan
[22]
cells: Battle of Chancellorsville
American Civil War
1863–04-30 !April 30 to May 6, 1863
3,330 killed[A 14]
Confederacy
[20]
cells: Tet Offensive
Vietnam War
1968–01-30 !January 30 to September 23, 1968
3,178 Killed
North Vietnam
[A 15]
cells: Operation Diadem (part of Battle of Monte Cassino)
World War II
1944–05-11 !May 11–18, 1944
3,145 killed
Germany
[24]
cells: Second Battle of Bull Run
American Civil War
1862–08-26 !August 26 to August 30, 1862
3,052 killed[A 16]
Confederacy
[20]
cells: Battle of Stones River
American Civil War
1862–12-31 !December 31, 1862 to January 2, 1863
3,024 killed[A 17]
Confederacy
[20]
cells: Battle of Chosin Reservoir
Korean War
1950–11-27 !November 27 to December 13, 1950
2,840~ killed[A 18]
China
[25]
cells: Battle of Sicily
World War II
1943–07-09 !July 9 to August 17, 1943
2,811 killed
Germany
[26]
cells: Battle of Leyte Gulf
World War II
1944–10-23 !October 23–25, 1944
2,800 killed
Japan
[27]
cells: Battle of Cold Harbor
American Civil War
1864–05-21 !May 21 to June 12, 1864
2,632 killed[A 19]
Confederacy
[20]
cells: D-day (first day of Operation Overlord)
World War II
1944–06-06 !June 6, 1944
2,499 killed
Germany
[2]
cells: Pearl Harbor Attack
World War II
1941–12-07 !December 7, 1941
2,403 killed[A 20]
Japan
[28]
cells: Battle of Peleliu
World War II
1944–09-15 !September 15 to November 25, 1944
2,336 killed
Japan
[29]
cells: Battle of Aachen
World War II
1944-09-12 !September 12 to October 21, 1944
2,000 killed
Germany
[30]
cells: Ruhr Pocket
World War II
1945-04-01 !April 1 to April 18, 1945
2,000~ killed
Germany
cells: Battle of Franklin
American Civil War
1864–11-30 !November 30, 1864
1,939 killed[A 21]
Confederacy
[31][32]
cells: Second Battle of the Marne
World War I
1918–07-15 !July 15 to August 6, 1918
1,926 killed[A 22]
Germany
[34]
cells: Po Valley Offensive
World War II
1945-04-06 !April 5 to May 8, 1945
1,914 killed
Germany
[1]
cells: Battle of Fredericksburg
American Civil War
1862–12-11 !December 11 to December 15, 1862
1,892 killed[A 23]
Confederacy
[35]
cells: Battle of Guam
World War II
1944–07-21 !July 21 to August 10, 1944
1,777 killed
Japan
[36]
cells: Battle of Seven Pines
American Civil War
1862–05-31 !May 31 to June 1, 1862
1,770 killed[A 24]
Confederacy
[37][38]
cells: Battle of Tarawa
World War II
1943–11-20 !November 20 to November 23, 1943
1,759 killed[A 25]
Japan
[39]
cells: Battle of Salerno
World War II
1943–09-03 !September 3 to September 16, 1943
1,635~ killed[A 26]
Germany
[40]
cells: Operation Undertone
World War II
1945-3-15 !March 15 to March 24, 1945
1,600~ killed[A 27]
Germany
[41]
cells: Battle of the Ch'ongch'on River
Korean War
1950–11-25 !November 25 to December 2, 1950
1,489 killed[A 28]
China
[42]
cells: Task Force Faith
Korean War
1950–11-27 !November 27 to December 2, 1950
1,450~ killed[A 29]
China
[43]
cells: Battle of Perryville
American Civil War
1862–10-08 !October 8, 1862
1,422 killed[A 30]
Confederacy
[45][44]
cells: Battle of Chattanooga
American Civil War
1863–09-21 !September 21 to November 25, 1863
1,114 killed[A 31]
Confederacy
[46]
cells: Battle of Belleau Wood
World War I
1918–06-01 !June 1 to June 26, 1918
1,062 killed
Germany
[47]
cells: Battle of Mindanao
World War II
1945-03-10 !March 10 to August 15, 1945
1,041 killed[A 32]
Japan
[48] [49]
cells: Battle for Manila (part of Battle of Luzon)
World War II
1945–02-03 !February 3 to March 3, 1945
1,010 killed
Japan
[50]

Questions about this table:
originalText: greatest loss of american lives in one day
answer: answerTexts: Battle of Normandy / Northern France