The Radar Bomb Scoring Division was a Strategic Air Command military organization which controlled the RBS units and operations of the 1st Combat Evaluation Group. The division included a maintenance office and as with the preceding 1st Radar Bomb Scoring Group at Carswell AFB, the division had 3 Radar Bomb Scoring Squadrons with RBS detachments at fixed radar stations and at semi-mobile radar stations. The semi-mobile stations called "MDLs (Mobile Duty Locations) were sites set up for SAC special missions [and the] equipment, trailers, books, etc" were stored at Barksdale AFB when not in use. Each squadron manned an RBS Express train, but the squadrons were inactivated in 1966 after Vietnam War deployments had begun. RBS trains were inactivated later in the war after the 1968-9 Project 69