Who is referred to as "The Grand Old Man of the Marine Corps"?

The title "The Grand Old Man of the Marine Corps" is attributed to Brigadier General Archibald Henderson due to his significant contributions and long-standing service within the Marine Corps during the 19th century. He served as the 5th Commandant of the Marine Corps from 1820 to 1859, a remarkable 39 years, which is the longest tenure of any Commandant.

Henderson was instrumental in shaping the identity and structure of the Marine Corps during a critical period of its development. His leadership helped to establish traditions and managerial practices that would influence the Marine Corps for decades to come. Notably, he was vital in advocating for the corps' role in naval operations and assisting in the professionalization of the Marine Corps.

This nickname honors not just his age but also the respect he commanded from both peers and subordinates, earning him a legacy that continues to be recognized within the Marine Corps community today.