Motorized infantry was the key to sustaining a breakthrough and until the 1930s that was not possible. "''
Though Hitler was committed to the attack based on political reasons to maintain the aura of German initiative on the Eastern Front he shared many reservations on military grounds with Guderian. Kann Westeuropa verteidigt werden?.
Germany's panzer (armoured) forces were raised and organized under his direction as Chief of Mobile Forces. He was a pioneer in the development of armoured warfare and was the leading proponent of tanks and mechanization in the Wehrmacht (German Armed Forces).