Humphrey Bogart CasablancaWikimedia Commons

World War I ended 100 years ago Sunday. 

Beginning in July 1914, the Great War lasted more than four years and killed an estimated 8.5 million soldiers and 13 million civilians. 

And of the more than 65 million troops that were mobilized during the war, a handful of them were very famous, especially during the time period. 

Here are 10 famous people who served during the Great War.