The term "Allied invasion" typically refers to military operations conducted by the Allied Powers during World War II to liberate occupied territories from Axis Powers. One of the most significant invasions was the D-Day invasion on June 6, 1944, when Allied forces landed on the beaches of Normandy, France. This operation marked a crucial turning point in the war, leading to the eventual defeat of Nazi Germany. The Allied invasion involved extensive planning and coordination among various nations, including the United States, United Kingdom, and Canada. It aimed to establish a foothold in Europe and push back against enemy forces. The success of the invasion was vital for the liberation of Western Europe and contributed to the overall victory in World War II.