This made it possible for I.G. Farben to synthesize fuel from coal gasification, to make aviation fuel, gas for their tanks and war machines, and for synthesizing rubber for making tires. They also made Zyklon B gas, which the Germans used to annihilate two million Jews according to the trial testimony of the Auschwitz camp commander.
Fritz Thyssen published a book titled I Paid Hitler in 1941. It described how Hitler used the money he received from Fritz Thyssen through Prescott Bush, sponsored the Storm Troopers of Ernst Roehm as early as 1933, allowing them to build up to 4,500,000 strong to take over Germany.