Existing military bases in Texas were expanded and numerous new training bases were built: Texas World War II Army Airfields; Brooke Army Medical Center, Camp Mabry, Corpus Christi Army Depot, Fort Bliss, Fort Hood, Fort Sam Houston, Ingleside Army Depot, Red River Army Depot, especially for aviation training. The good flying weather made the state a favorite location for Air Force training bases. In the largest aviation training program in the world, 200,000 graduated from programs at 40 Texas airfields, including 45,000 pilots, 12,000 bombardiers, 12,000 navigators, and thousands of aerial gunners, photographers, and mechanics. Fred Allison in a study of Majors Field, the Army Air Forces Basic Flying School, at Greenville during 1942–45, shows that the base—like most military bases in rural Texas—invigorated the local economy, but also changed the cultural climate of the conservative Christian town, especially around unprecedented freedom regarding alcohol, dating and dancing, and race relations.