RTUs were oversized units which trained aircrews prior to their deployment to combat theaters and assignment to an operational group. In January 1944, the group began a split operation when group headquarters and the 450th and the 535th squadrons moved to Camp Springs Army Air Field, Maryland, and the remaining squadrons transferred to Millville Army Air Field, New Jersey. The 450th Squadron did not become operational until the move to Camp Springs. However, the Army Air Forces found that standard military units, based on relatively inflexible tables of organization were proving less well adapted to the training mission. Accordingly, a more functional system was adopted in which each base was organized into a separate numbered unit. while the groups and squadrons acting as RTUs were disbanded or inactivated. This resulted in the 87th, along with the 450th Squadron at Camp Springs, being disbanded in the spring of 1944 and being replaced by the 112th AAF Base Unit (Fighter), which assumed the group's mission, personnel, and equipment. The 535th was replaced by the 125th AAF Base Unit (Fighter), and the two squadrons at Millville were rolled into the 135th AAF Base Unit (Fighter). The group was reactivated in 1949 in the Air Force Reserve at Bergstrom Air Force Base as a corollary unit to Strategic Air Command's 27th Fighter Group with one operational squadron and two support units. With no aircraft assigned, reservists of the unit flew the North American F-82 Twin Mustangs, and later, the Republic F-84 Thunderjets of the 27th. When most of the 27th group deployed to Korea for the Korean War, the group became affiliated with the 12th Fighter-Escort Group. The group was called to active service in May 1951. After its personnel were used to man other units, the group was inactivated in June. In 1952 the group was redesignated as the 87th Troop Carrier Group, and assigned to the newly constituted 87th Troop Carrier Wing under the wing base organization system and activated at Atterbury Air Force Base. The 87th wing replaced the 923d Reserve Training Wing at Atterbury when reserve flying operations resumed there. The group operated a mix of aircraft to train reservists. In February 1953 the 434th Troop Carrier Group was released from active duty and activated in the reserves, assuming the mission, personnel and equipment of the group.  87th Pursuit Group  87th Tactical Airlift Group