Not Friday yet, but here's a quick history lesson:
The AAF graduated over 193,000 pilots (just pilots, not bombardiers, navs, flt engineers, gunners, etc.) in 6 years, between Jul '39 and Aug '45.
There were only 966 student pilots in training in Sep 39. By Dec 43, there were 74,000 pilots in stateside training alone. Bottom line, Of course there was little to no briefing. The instructors were barely more qualified than their students. They had comparatively little knowledge to offer, and minimal time to impart what wisdom they did have. Wartime flying "training" was less training than Darwinian survival of the fittest, because it was the blind leading the blind. Consequently, there were 136,000 flying training eliminees and fatalities in stateside training alone. Over 65,000 aircraft were lost in the CONUS alone during the war (15,000 of them were heavy & very heavy bombers).
My point--Wanna get people killed or injured? Fight wars without effective planning, briefing and postmission debriefing. WW II sounds really awesome, until you realize the human carnage and piles of bent metal that went along with it.
TT