Who was the first Commandant of the Marine Corps?

The first Commandant of the Marine Corps was Captain Samuel Nicholas. Appointed in 1798, Nicholas was instrumental in establishing the early structure and organization of the Marine Corps. His leadership helped to define the identity and operational capabilities of the Marine Corps during its formative years. Samuel Nicholas oversaw the recruitment and training of the first marines, played a key role in building the foundational principles that guide the Corps, and was pivotal in establishing a sense of teamwork and military discipline that persists in Marine training today. Understanding his contributions is crucial to appreciating the historical significance and legacy of the Marine Corps.

The other figures listed are notable Marine Corps leaders but served in different capacities and at later points in history. General John A. Lejeune is often celebrated for his extensive reforms and for setting the standards for modern Marine Corps operations, while General Alfred M. Gray and LtGen Lewis "Chesty" Puller are known for their distinguished careers and contributions to Marine Corps history during the 20th century. However, none of these leaders served as the first Commandant, which is a specific historical appointment uniquely associated with Captain Samuel Nicholas.