Santa Ana Army Air Base was a military installation located in Santa Ana, California. Established during World War II, it served as a training center for pilots and support personnel. The base played a crucial role in preparing aircrews for combat missions, contributing to the war effort. After the war, the base was closed in 1946 and later repurposed for civilian use. Today, the site is home to the John Wayne Airport and various commercial developments, reflecting the transition from military to civilian purposes in the region.