This isn't new news. This is very widely done around the world. The US military still does it to this day. Do a search online for "go pills".
Apparently, everybody used amphetamines in WWII as well: Germans, Japanese, Soviets, also US and British. It looks like it was a bigger thing with the Germans than with us or the British, though. Kamikazis used meth -- it had been developed by Japanese chemists in 1919 -- and addiction became a real problem in Japan. Hitler had it injected intravenously himself.
During my 400 day tour with the Marines in Vietnam, nearly everyday at 5PM a helicopter would deliver our beer ration to our firebase location. We all got two beers a day.