Using planes, tanks, and trucks in the first example of a blitzkrieg, or “lightning war,” Hitler’s armies crushed Poland in four weeks. The Soviet Union quickly took its share agreed to in the secret protocol — the eastern half of Poland and the Baltic states of Lithuania, Estonia, and Latvia. In the west French and British armies dug in; they expected another war of attrition and economic blockade. But in spring 1940 the Nazi lightning war struck again. After occupying Denmark, Norway, and Holland, German motorized columns broke through southern Belgium and into France.

As Hitler’s armies poured into France, aging marshal Henri-Philippe Pétain formed a new French government — the so-called Vichy (VIH-shee) government — and accepted defeat. By July 1940 Hitler ruled practically all of western continental Europe; Italy was an ally, the Soviet Union a friendly neutral (Map 30.2). Only Britain, led by Winston Churchill (1874–1965), remained unconquered.

To prepare for an invasion of Britain, Germany first needed to gain control of the air. In the Battle of Britain, which began in July 1940, German planes attacked British airfields and key factories. In September Hitler began indiscriminately bombing British cities to break British morale. British aircraft factories increased production, and Londoners defiantly dug in. By September Britain was winning the air war, and Hitler abandoned his plans for an immediate German invasion of Britain.

Hitler now allowed his lifetime obsession of creating a vast eastern European empire for the “master race” to dictate policy. In June 1941 Germany broke the Nazi-Soviet nonaggression pact and attacked the Soviet Union. By October Leningrad was practically surrounded, Moscow was besieged, and most of Ukraine had been conquered. But the Soviets did not collapse, and when a severe winter struck German armies outfitted in summer uniforms, the invaders were stopped.

Although stalled in Russia, Hitler ruled an enormous European empire. He now began building a New Order based on the guiding principle of Nazi totalitarianism: racial imperialism. Hitler envisioned a vast eastern colonial empire where enslaved Poles, Ukrainians, and Russians would die or be killed off while Germanic peasants would resettle the abandoned lands. Himmler and the elite SS corps, supported by military commanders and German policemen, implemented a program of destruction in the occupied territories to create a “mass settlement space” for Germans.