The total casualties in World War I are just under 37.5 million people, including soldiers killed, wounded, prisoners and missing in action. This war is among the bloodiest in recorded history. More »

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As of 2015, the American war with the highest number of casualties is the U.S. Civil War. During the Civil War, 620,000 Americans died. World War II is the war with the next highest level of causalities, with 405,000 Ame... More »

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The United States suffered 33,686 deaths in battle in the Korean War. There were an additional 2,830 deaths which occurred during the war, but were not related to any battle. More »

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Although there is some debate about the true number of World War I casualties, the U.S. Department of Justice estimates that a total of 5,142,631 souls perished during the war. Russia lost the highest number of people, w... More »

During World War I, a total of 116,516 American soldiers were killed. That is the seventh most deaths of any country that participated in the war. The United States sent 4,355,000 soldiers to participate in the war, and ... More »

Although the assassination of Austrian Archduke Franz Ferdinand is cited as the main cause that thrust the world into war, many causes and events led up to World War I. Some of the secondary causes include the mutual def... More »

World War I, which started in July 1914 and ended Nov. 11, 1918, was responsible for more than 17 million casualties, approximately 100,000 of which were troops from the United States. Causes of World War I include mutua... More »

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