Did the US stuffer more or less Casualties during World war 1?

Compared to the other countries involved in the war? Less, most likely because the US only had significant military presence beginning in the summer of 1918. Compared to World War II? Again less, this time because of the difference in technology and length of American troop commitment. Compared to the US Civil War? Almost 500,000 less because the Civil War was desperately fought by only Americans. There were more American casualities in World War I than each of the following: American Revolution, War 1812 and the Spanish-American War.