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The German military began formally experimenting with Pervatin shortly before World War II. After numerous trials, including tests on college students, military leaders became convinced of its capabilities. Soldiers could endure extended periods without sleep, covering significant ground in minimal time.
For the invasion of Poland in September 1939, Pervatin was issued alongside soldiers' rations. The results were staggering. Troops could march for days and cover impressive distances while carrying heavy combat loads. This newfound endurance played a critical role in the quick fall of Poland — just 28 days.