 Although Germany seized the oil supplies of conquered states – for example reducing France to a mere 8 percent of its pre-war oil consumption – this was still not enough for the needs of the war.Acute fuel shortages forced the German military to cut back on training for its drivers and pilots, because training would be a waste of fuel.The Soviets and the Americans had accurate reports of Germany’s oil supplies, but refused to believe that the Nazi government would take the risk of starting a war with so little fuel security, so they assumed that Germany must have had vast amounts of well-hidden supplies that they were not able to detect.