Methamphetamine was invented in Germany in 1937 and the German military at the time was very quick to adopt its use.
An army of tweakers. I don't think that this aspect of the War and the Holocaust are discussed enough. Certainly no excuse, but it is very interesting.
> Chronic Meth users have deficits in memory and executive functioning as well as higher rates of anxiety, depression, and most notably psychosis. [0]
In more recent times of horror:
> After the fall of the al-Assad regime in Syria, large stockpiles of the illicit drug captagon have reportedly been uncovered.
> The stockpiles, found by Syrian rebels, are believed to be linked to al-Assad military headquarters, implicating the fallen regime in the drug’s manufacture and distribution. [1]
[0] https://pmc.ncbi.nlm.nih.gov/articles/PMC3764482/
[1] https://theconversation.com/what-is-the-drug-captagon-and-ho...
Everybody who could afford it adopted psychostimulants in WW2. Go pills have been part and parcel since then. Some countries have adopted modafinil, but the US still uses amphetamine.