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What was the significance of the Normandy Invasion in World War II?

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American soldiers in helmets crouch inside a landing craft approaching a smoke-covered beach during the D-Day invasion of Normandy, June 6, 1944. — Normandy Invasion American assault troops in a landing craft during the Normandy Invasion, June 6, 1944.

The Normandy Invasion, launched on June 6, 1944, was a pivotal moment in World War II. Allied forces, including American, British, and Canadian troops, landed on five beaches in Normandy, France. This operation marked the beginning of the liberation of western Europe from Nazi Germany. By the end of August 1944, northern France was freed, paving the way for the Allied advance into Germany and the eventual defeat of the Nazi Reich. The invasion's success was heavily reliant on air supremacy and involved complex amphibious and airborne assaults.123