They would continue to do so until Germany's surrender in 1945, weakening the war effort and demolishing cities.
Beginning in 1938, the Nazis increased their territorial control outside of Germany. By 1942, three years into World War II, Nazi Germany reached the peak of its expansion. At the height of its power, Germany had incorporated, seized, or occupied most of the continent. However, also in 1942, the Allied Powers started to systematically bomb Germany. They would continue to do so until Germany's surrender in 1945, weakening the war effort and demolishing cities.