In 1942, Germany dominated most of Europe. Greater Germany had been enlarged at the expense of its neighbors. Austria and Luxembourg were completely incorporated. Territories from Czechoslovakia, Poland, France, Belgium, and the Baltic states were seized by Greater Germany. German military forces occupied Norway, Denmark, Belgium, northern France, Serbia, parts of northern Greece, and vast tracts of territory in eastern Europe. Italy, Hungary, Romania, Bulgaria, Slovakia, Finland, Croatia, and Vichy France were all either allied to Germany or subject to heavy German influence. Between 1942 and 1944, German military forces extended the area under their occupation to southern France, central and northern Italy, Slovakia, and Hungary.
Source: U.S. Holocaust Memorial Museum