In World War II, the Nazis’ swift, forceful blitzkriegs relied on soldiers supplied with as much Pervitin (amphetamine) as they wanted. For sailor and pilots, too, it was the German wonder drug. When the war started going bad for Germany and injuries mounted, government laboratories synthesized methadone because they couldn’t get the opium needed to produce Pervitin.
When German soldiers developed a tolerance for Pervitin, the Nazi pharmacologists came up with a cocktail called D-IX that had five milligrams of cocaine, three of Pervitin, and five more of a morphine derivative. So…Nazis were drugged up and handed guns. Basically.