are the marines a branch of the navy
United States Marine Corps The United States Marine Corps (USMC), also known as the United States Marines, is a branch of the United States Armed Forces responsible for conducting amphibious operations[10] with the United States Navy. The U.S. Marine Corps is one of the four armed service branches in the U.S. Department of Defense (DoD) and one of the seven uniformed services of the United States.
Hospital corpsman Hospital corpsmen work in a wide variety of capacities and locations, including shore establishments such as naval hospitals and clinics, aboard ships, and as the primary medical caregivers for sailors while underway. Hospital corpsmen are frequently the only medical care-giver available in many fleet or Marine units on extended deployment. In addition, hospital corpsmen perform duties as assistants in the prevention and treatment of disease and injury and assist health care professionals in providing medical care to sailors and their families.