Most lethal American battles

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The following is a list of the most lethal battles fought by the military of the United States of America. This list shows the number of Americans killed during the battle.


Battle, Siege, or Offensive Conflict Dates Estimated number of Americans killed
Meuse-Argonne Offensive World War I September 26, 1918 to November 11, 1918 26,277 killed
Battle of Okinawa World War II April 1, 1945 to June 21, 1945 Over 18,900 killed
Battle of the Bulge World War II December 16, 1944 to January 25, 1945 19,276 killed
Battle of Gettysburg American Civil War July 1, 1863 to July 3, 1863 7,863 killed (3,155 Union and 4,708 Confederacy)
Battle of Iwo Jima World War II February 16, 1945 to March 26, 1945 7,000 killed
Battle of Antietam American Civil War September 17, 1862 4,808 killed (2,108 Union and 2,700 Confederacy)
D-day (first day of Operation Overlord) World War II June 6, 1944 1,465 killed
Battle for Manila World War II February 3, 1945 to March 3, 1945 1,010 killed
Pearl Harbor Attack World War II December 7, 1941 Over 2,500 killed