 Complete the following phrase:  His small air force was reinforced by the 57th Fighter Group P-40s and 12th Bomb Group B-25s in July and August, and Brereton drew heavily on the experiences of Coninghams Western Desert Air Force. While the heavy bombers continued to operate from Palestine, the mediums and fighters moved forward as the battle line advanced. On October 22, 1942, the U.S. Desert Air Task Force was formed with Brereton in command to support the 