Recognition of the Japanese Zero Fighter was a 1943 film produced by the United States Air Force to instruct pilots in the Pacific theater how to recognize enemy aircraft at long distances and avoid “friendly fire” incidents.
Emphasis was on recognizing difference between a USAAF P-40 Warhawk and a Japanese Mitsubishi Zero.
15,000 U.S. Airmen were killed in training in WW II
https://www.realclearhistory.com/articles/2019/02/12/staggering_statistics_15000_us_airmen_killed_in_training_in_ww_ii_412.html