Ralph Johnson Mitchell was a decorated aviation officer of the United States. He is most noted for his service as Director of Aviation during the years 1939–1943 and commanding officer of the 1st Marine Aircraft Wing during World War II.

The Deputy Commandant for Aviation (DCA) is the United States Marine Corps' principal advisor on all aviation matters and is the spokesperson for Marine Corps Aviation programs, requirements, and strategy throughout the Department of the Navy and the Department of Defense. DCA is normally the highest-ranking naval aviator in the Marine Corps and reports directly to the Commandant of the Marine Corps. The role of DCA is an administrative position and has no operational command authority over United States Marine Corps Aviation forces.