Presidents and parties responsible for America's deadliest wars

The biggest conflicts of the 20th century:

Second World War (1939-45) 20 million casualties

First World War (1914-17) 8,5 million killed

Korean War (1950-53) 1,7 million killed

Chinese Civil War (1945-49) 1,2 million killed

Vietnam War (1965-73) 1,2 million killed