Hoping to escape his mother and his unstable home life, Oswald drops out of high school and enlists in the Marines at age 17. But the violent behaviors he learned in childhood go with him. Oswald’s antics get him court-martialed — twice. He serves at an air base in Japan, where the CIA is also operating, leading to claims that Oswald is somehow involved in espionage. Oswald also does something else in the Marines: he learns to shoot a rifle.