The Aces that history forgot - US Aerial Gunners WW2. United States 1943, six aerial gunnery schools are pumping out 3 500 gunners per week, by the end of WW2 they had graduated nearly 300 000 men. The casualty rate for these aircrews was extremely high, and even in training 15 000 US aircrew was killed in accidents during the war. The Air Force view was that it was too hard to assign credit to individual gunners where dozens of guns may have been blazing away at the same target. Some units gave the gunners more recognition, but is was rare and only a few are recorded. See them train in this Video