→ German World War II Conquests
World War II began on September 1, 1939 with the German invasion of Poland. In 1940, Denmark, Norway, Belgium, Luxembourg, the Netherlands, and France were occupied in the wake of the "blitzkrieg". Yugoslavia and Greece followed in early 1941, and the Germans attacked the Soviet Union in June of that same year. The area under German control reached its largest extent in 1942, stretching from Norway to North Africa, and from France to the Caucasus Mountains.