Aussies KIA in WWI: 60,000
Americans KIA in WWI: 53,402
Aussies KIA in WWII: 27,073
Americans KIA in WWII: 291,557
Australia entered WWI on 4 August 1914
America entered WWI in April 1917
Australia entered WWII on 3 September 1939
America entered WWII on 7 December 1941
You Aussies are quick to fight. We tried to mind our own business but people keep instigating us. Just because we weren't in one of your battles or was reluctant to fight across the world doesn't make Australia a saint. How many Aussies were KIA(killed in action) in the Civil War? 0. Over 600,000 Americans but of course you wouldn't know about that because no Australians died.