The 37th Training Wing (37 TRW) is a unit of the United States Air Force assigned to the 2nd Air Force and the Air Education and Training Command. As the host unit to Lackland Air Force Base, Joint Base San Antonio, Texas, the 37th TRW is the predominate unit on the installation and is the largest training wing in the USAF. Known as the "Gateway to the Air Force", the 37th Training Wing's replaced the Lackland Training Center as the single basic military training for the USAF.