The Chairman of the Joint Chiefs of Staff may hold what rank?

The position of Chairman of the Joint Chiefs of Staff is the highest-ranking military officer in the United States Armed Forces and is typically held by either a General in the Army, Air Force, or Marine Corps or an Admiral in the Navy. This role requires the individual to possess extensive leadership and strategic experience, which is usually acquired through achieving the rank of General or Admiral.

It's important to note that the Chairman serves as the principal military advisor to the President, the National Security Council, and the Secretary of Defense; therefore, the rank must reflect the significant authority and responsibility of the role. The other ranks listed, such as Colonel, Major, and Lieutenant Commander, do not align with the gravity and stature expected from the Chairman, making them unsuitable for this highest position in the U.S. military hierarchy.