September 1, 1939. Hitler launched the German army's offensive in Poland: in less than a month, the country was invaded and totally crushed. A blitzkrieg that the Wehrmacht owes to its tactical and technological superiority, but also to a new substance, a powerful synthetic drug known today as “crystal meth”: Pervitine. But how did it become a weapon of war? Was it really a key element of Nazi domination? And what relationship did Adolf Hitler and other Nazi dignitaries have with the drug?