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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.
The training of enlisted men in medical specialties was part of basic training. Basic training in 1940 was a total of 13 weeks with 11 weeks allotted for technical and advanced tactical training, leaving 8 weeks for technical training including medic training.