The 4th Fighter Group destroyed more enemy planes in the air and on the ground than any other group of the 8th Air Force in WWII. Incorporating the Eagle Squadrons of the Royal Air Force, the 4th FG was activated in 1942 in England, becoming the only American unit to be activated in an active combat theater and the oldest group in the 8th AF. The 4th initial operated with Spitfires but changed to P-47s and finally to P-51s. The first 8th AF fighter group to penetrate German air space and first to engage enemy aircraft over Paris and Berlin, the 4th claimed 1000 kills , the highest of any USAAF fighter group in WWII. Over 250b/w photos, line drawings, 10 color profiles; 80 pages.