Yet Schrader thought he had failed in his quest because the substance could not be used in agriculture – and help feed Hitler’s armies – because it was so toxic.
But Hitler immediately saw other uses for it. A keen military historian, he knew Germany had started what became known as the ‘chemists’ war’ on April 22, 1915, when chlorine gas was fired at French soldiers in the trenches.
More than 90,000 soldiers would be killed by poisonous gas, which blew in across the Allied positions as ‘queer greenish-yellow fog,’ in the words of a survivor. He added: ‘Many fell and died on the spot. The others, gasping, stumbling, with faces contorted, hands wildly gesticulating, and uttering hoarse cries of pain, fled madly through the villages and farms and through Ypres itself, carrying panic to the remnants of the civilian population.’
The blistering agent mustard gas, or sulfur mustard, was also used by the Germans, prompting Siegfried Sassoon, the English soldier and poet, to describe the horrors of inhaling gas and the sound of ‘blood... gargling from froth-corrupted lungs’.
Sarin is far deadlier than either chlorine or mustard gas.
So potent was this poison that in 1940, the Waffenamt – the German Army weapons agency – began building a secret production facility, staffed by scientists wearing protective suits. Schrader was brought in to head up the project.
Ten tons of sarin was produced – enough to kill millions. But Hitler never used it after being warned by his experts that the West, including Britain and America, had supplies of mustard gas and would unleash their own horrors on the Fatherland in retaliation.