Kurt Vonnegut
Though he was in training at Cornell, Kurt was kicked out of the program due to a satirical article he had written and his poor grades. No longer a student, he could not defer from the army and was drafted into the US Army where he studied to be an engineer. While in WWII, he was captured by Germans but was freed before the train took him to a prison camp. He also survived the bombing of Dresden.
Buster Keaton
Buster Keaton was one of the top silent film stars, but he also was a military man. Buster served during World War I as a part of the American Expeditionary Forces in France. He was with the United States Army's 40th Infantry Division. During this time, he got an ear infection that permanently altered his hearing. His unit remained intact throughout his term due to late enlistment.