"The aim was to use D-IX to redefine the limits of human endurance."
The German during the Second World War again using drugs, stimulants and painkillers combined, the thought of course being to create a soldier impervious to pain and fatigue, able to sustain a frenetic pace for an extended period, well beyond the normal human physical and mental capability!!
From the wiki entry for the Biber midget submarine:
" Operations generally lasted from one to two days with pilots either using a drug known as DIX to stay awake on longer missions or caffeine-laced chocolate."
[chocolate of itself is a stimulant, containing in the natural state a measure of caffeine!]
D-IX however a stimulant, a DRUG even more of an enhancement than mere caffeine! Developed and used at the very end of the war - - a drug "cocktail" unmatched in potency!
D-IX was a cocaine-based experimental drug cocktail developed by the Nazis in 1944 for military application. Nazi doctors found that equipment-laden test subjects who had taken the drug could march 55 miles (88.5 kilometers) without resting before they collapsed. Each tablet contained 5 mg of Oxycodone . . . 5 mg of Cocaine and 3 mg of Methamphetamine . . . the war ended before D-IX could be put into mass production, though it did see limited use among a handful of Neger and Biber pilots." [both midget submarines!]
Oxycodone of course a very powerful pain killer, a drug with much potency and quite popular among "junkies" nowadays!!
"Prisoners at Sachsenhausen who were given the drug, code-named D-IX, were forced to march in circles carrying 20kg packs. They were able to march 55 miles without resting."
These prisoners too, concentration camp inmates were already in a reduced state both physically and mentally? Mr. Feelgood stuff that creates a persons of enhanced physical strength and mental awareness - - at least for a while. The tempo of modern warfare, mechanized, day and night, movement frenetic and endless for an extended period, beyond the capacity of the human body and mind to endure, some method needed to create the super-troop who can "keep up the pace" as demanded by the general officer in charge!!
The Nazi normally thought of as advocating the clean and sober natural life, enhancements eschewed and discouraged, even treated as a severe criminal offense unless during Octoberfest?
The war ended before D-IX could be brought to fruition and issued to the troops in abundance, but nonetheless the intent and desire was there!!