View images taken in Belgium and the Netherlands during World War II. Belgium and the Netherlands were invaded by Nazi Germany in the late spring of 1940, in the early years of World War II. Both countries experienced heavy losses and destruction to their cities, and much of the population was forced to work in German factories to support the war effort. Much of the Jewish population of both countries was deported to German concentration camps. Allied forces would eventually liberate Belgium by October 1944, and the Netherlands in May of 1945.