Disease.
Far more men died from disease than from bullets or mortars.
New guns and weapons
WW2.
Infection
Who were all the important people during the Civil War?
yes
800,5023
diseases
World War II (73,000,000) and American Civil War (620,000)
No, 620,000 people died in the American Civil War which is more than all of the other American Wars combined.
The Wilderness.
The most Americans died in Vietnam which was also the longest war that America was involved in.
620,000 people died in the American Civil War, which is more than all of the other American wars combined.