Camp Bullis Military Training Reservation is a U.S. Army training camp comprising in Bexar County, Texas, USA, just northwest of San Antonio. The camp is named for Brigadier General John Lapham Bullis, Camp Bullis and Camp Stanley make up the Leon Springs Military Reservation. Camp Bullis is used primarily as maneuvering grounds for U.S. Army, Air Force and Marines combat units. It is also utilized as a field training site for the various medical units stationed at Brooke Army Medical Center in nearby Fort Sam Houston.