Jesse Ventura
Jesse Ventura is a former professional wrestling and media personality who had distinguished career as a member of the U.S. Navy underwater demolition team during the Vietnam war. He did not see any active combat. He was frequently referred to as a Navy Seal, but he never completed the final training to become an actual Seal. He left the Navy and Vietnam in 1975 and started to build up his career as a wrestler from there.
Jimi Hendrix
Jimi did not enter the military because he wanted to; after getting busted for stealing a car, he was given a choice – the US Army or prison. He enlisted and got assigned to the 101st Airborne Division. Jimi expressed his feelings about serving in the army in a letter to his dad, “There’s nothing but physical training and harassment here for two weeks, then when you go to jump school, that’s when you get hell. They work you to DEATH, fussing and fighting.” His struggles were many, but thankfully he didn’t serve long. He was honorably discharged after one year due to an ankle injury sustained during a jump.
George Carlin
George Carlin was a member of the U.S. Air Force but apparently had a rough time in the military. He was stationed at Barksdale Air Force Base in Louisiana as a radar technician. He was court martialed three times and received a general discharge, but his work as a disc jockey while on active duty was the jump start for his entertainment career.