In the aftermath of the Korean War, TAC developed the Composite Air Strike Force (CASF) concept, a mobile rapid-deployment strike concept designed to respond to "brush fire" conflicts around the world. A CASF included fighter bomber aircraft for both conventional and nuclear attack missions, as well as troop carrier, tanker, and tactical reconnaissance assets. TAC composite air strike forces were intended to augment existing combat units already in place as part of United States Air Forces in Europe (USAFE), the Pacific Air Forces (PACAF), or the Alaskan Air Command (AAC).