Adam Driver
Following the 9/11 attacks, Adam Driver decided to enlist in the US Marine Corps. He was put in Weapons Company, 1st Battalion, 1st Marines and he was an 81mm mortarman. He served for almost three years before attending the prestigious art school, Juilliard, where his classmates recalled he was stoic and intimidating but a very skilled actor.
James Stewart
During World War II, many celebrities were at odds debating whether or not to enlist or avoid the draft. Jimmy Stewart was among the first stars to join the movement on his own accord. He was not given any special treatment, and since he had already earned his pilot's license, he easily moved among the ranks in the US Army Air Corps. He was one of very few Americans to go from private to colonel in only 4 years.