Who is recognized as the first Sergeant Major in the Marine Corps?

Archibald Sommers is recognized as the first Sergeant Major in the Marine Corps due to his unique contributions and the formal establishment of the rank. His appointment in 1957 as the first individual to hold the title of Sergeant Major of the Marine Corps marked a significant evolution in the leadership structure within the Corps. This position was created to serve as a senior enlisted advisor to the Commandant, reflecting an increased emphasis on the voice and perspective of enlisted personnel in leadership discussions.

The choices provided include individuals who have made their marks in Marine Corps history for various reasons, but they did not have the significant historical impact on the development of the enlisted ranks as Sommers did. For example, GySgt John Basilone is celebrated as a Medal of Honor recipient for his heroism during World War II, while PFC Jack Lucas earned recognition for brave acts during the same conflict. Their accomplishments are notable but pertain to valor rather than the establishment of enlisted rank structures. Similarly, Corporal John Mackie's contributions do not align with the pivotal recognition that Archibald Sommers achieved through the inception of the Sergeant Major of the Marine Corps role. Thus, Sommers stands alone as the foundational figure for this critical position.