Meth specifically is believed to be one of the contributing factor in the early success of the German army. Interestingly, I believe the same was used by the Ja

Meth specifically is believed to be one of the contributing factor in the early success of the German army. Interestingly, I believe the same was used by the Japanese to encourage suicidal attacks, since, it turns out, it's easier to carry one when you're high as a kite.