A Major in the Marine Corps is equivalent to what rank in the Navy?

The correct answer is that a Major in the Marine Corps is equivalent to a Lieutenant Commander in the Navy. This equivalency is based on the rank structure of the U.S. Uniformed Services, where the ranks are aligned across different branches for purposes of pay and structure.

A Major in the Marine Corps holds the O-4 rank, while a Lieutenant Commander in the Navy also holds the O-4 rank. This means that they are at the same level in terms of seniority, responsibilities, and pay grade.

Understanding the rank equivalency is essential for inter-service operations and collaboration, especially in joint military operations. It helps members of the different branches recognize the appropriate hierarchy and fosters effective communication and understanding across services.