U.S. Military Deaths in Major Conflicts Since WWI

The Cost of War

Memorial Day, observed annually in the U.S. on the final Monday of May, is a time to honor members of the armed forces who have died while serving the country. Since World War I, over 600,000 U.S. military personnel have died in various conflicts, according to government data.

World War II was the deadliest conflict for the U.S., with more than 400,000 service members losing their lives, as reported by the Defense Casualty Analysis System. In the 21st century, military operations in Afghanistan and Iraq have resulted in over 7,000 U.S. military deaths.

However, these conflict-specific figures do not account for all military fatalities. From 1980 to 2022, nearly 61,000 service members died while on active duty, averaging over 1,400 deaths annually. This number includes more than 250 deaths each year from self-inflicted wounds, in addition to those caused by accidents, illnesses, and homicides.

The following breakdown reflects active-duty death tolls for major U.S. military conflicts since the start of the 20th century. The figures are categorized by the Defense Casualty Analysis System into hostile deaths (those resulting from combat or terrorist activities), other deaths (including accidents and illness), and nonhostile deaths (including missing and presumed dead cases).