Will the military train you to become a doctor even though dont have grades?

No, the military will not train you to become a doctor if you lack the necessary prerequisites, which includes a strong academic record. Military medical training programs, like those for physicians, require a medical degree from an accredited university, which in turn requires excellent grades in prerequisite science courses and a high score on the Medical College Admission Test (MCAT). Simply joining the military doesn't grant you access to medical school. They may offer medical training for specific roles like medic or corpsman, but these are not the equivalent of becoming a physician.