text: World War II By the time World War II began, Miramar was already undergoing a "precautionary" renovation. Camp Holcomb (later renamed Camp Elliott) was built on part of old Camp Kearny, to be used for U.S Marine Corps artillery and machine gun training. Camp Elliott became home to Fleet Marine Force Training Center, West Coast, and the 2nd Marine Division, charged with defending the California coast. Runways were constructed in 1940, and the 1st Marine Air Wing arrived on 21 December of that year. The Navy commissioned Naval Auxiliary Air Station (NAAS) Camp Kearny in February 1943, specifically to train crews for the Consolidated PB4Y-2 Privateer, which was built less than  away in San Diego. A month later, the Marines established Marine Corps Air Depot Camp Kearny, later renamed Marine Corps Air Depot Miramar, to avoid confusion with the Navy facility.
  The big Privateers proved too heavy for the asphalt concrete runway the Army had installed in 1936 and the longer runways built in 1940, so the Navy added two concrete runways in 1943.
  During the 1940s, both the Navy and the Marine Corps occupied Miramar. East Miramar (Camp Elliott) was used to train Marine artillery and armored personnel, while Navy and Marine Corps pilots trained on the western side. The bases were combined and designated Marine Corps Air Station Miramar in 1946.
  Naval Air Station
  In 1947, the Marines moved to MCAS El Toro in Orange County, California, and Miramar was redesignated as NAAS Miramar (Naval Auxiliary Air Station Miramar). It became NAS Miramar (Naval Air Station Miramar) on 1 March 1952. In 1954, the Navy offered NAS Miramar to San Diego for $1 and the city considered using the base to relocate its airport. But it was deemed at the time to be too far away from most residents and the offer was declined.