amphetamines probably helped turn clouded judgement into bad decisions
Indeed. I'd be interested to see the evidence on which the US armed forces uses stimulants. There is no evidence at all, as far as I know, that amphetamine-based stimulants actually enhance performance. Rather, the evidence is that they downgrade it and considerably so. Further, idiosyncratic reactions (paranoia, halluciantions etc.) are not uncommon side effects.
I'm gobsmacked that this stuff is still used. My mum was fed benzedrine-laced tea as a WAAF during the war to help keep her awake until the bombers got back, but I thought it had gone out with the ark.
QDM