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How Long Is Basic Training in the Marines? The United States Marine Corps is known as America's first line of defense. To become a Marine, you must be at least 17 years old at the time of enlistment and hold a high school diploma. You must also complete 12 weeks of intense training.
During the first week of basic training, Marine recruits undergo evaluations and tests. Over the following weeks they learn various skills to prepare them for combat. In Week 2 they learn basic Marine discipline and routine. Week 3 focuses on bayonet combat. Week 4 covers rifle combat, with padded pugil sticks used in place of rifles. By Week 5, recruits will begin hand-to-hand combat training.