https://newrepublic.com/article/141125/third-reich-addicted-drugs
https://www.amusingplanet.com/2020/05/pervitin-wonder-drug-that-fueled-nazi.html
Most sources cite the ‘three days’ demanded by Guederian, but I’m almost positive I’ve read accounts of individual Nazi tankers go 5-6 days without sleep during the Battle of France. I’ll keep looking for the source on that.
AFAIK Theres also This case of a Finnish soldier taking hell a lot of Meth and walking 300km in 7 days through the snow right through enemy territory.
Tried to grab a pervitin pill with his mittens to stay awake, couldn’t grab just one, so he just downed a handful, figuring it wouldn’t be THAT big a deal.
Man took 30 pills, his entire’s squads allocation, and completely blacked out. No memory of his journey, just operating on meth.