The Commandant of the Marine Corps is the highest-ranking officer in the United States Marine Corps. This position is responsible for overseeing all operations, training, and administration of the Marine Corps. The Commandant serves as a key advisor to the President and the Secretary of Defense on Marine Corps matters. The Commandant is appointed by the President and typically holds the rank of four-star general. This role involves strategic planning and ensuring that the Marine Corps is prepared for various missions. The Commandant also represents the Marine Corps in joint military operations and collaborates with other branches of the military, such as the Army and Navy.