John A. Lejeune

John A. Lejeune was a prominent United States Marine Corps officer, serving as the 13th Commandant of the Marine Corps from 1920 to 1929. He is recognized for modernizing the Marine Corps and promoting the importance of amphibious warfare, which involves operations launched from the sea against enemy land forces. Lejeune emphasized the development of Marine Corps tactics and training, enhancing the effectiveness of the organization. He is also known for his contributions to Marine Corps heritage, including the establishment of the Marine Corps birthday celebration and the famous "Lejeune's Birthday Message" honoring all Marines.