1944 – The D-Day landings at Normandy

Code-named Operation Neptune, the D-Day landings took place along a 50 mile stretch of Normandy beach. 156,000 Allied troops – primarily Americans and British, but also Commonwealth and Free European forces – landed across five beaches code-named Gold, Juno, Omaha, Sword and Utah. It was the largest amphibious operation in history, and took the Nazi forces in Normandy almost entirely by surprise, beginning the rollback of German forces in Europe.

It was also only a part of Operation Overlord, which featured co-ordinated airborne assaults, two separate deception operations aimed to distract from it, and a range of additional actions by the French Resistance. The operation was largely successful, opening a Western front in Europe, and sealing the end of the Nazi occupation of France.

Referenced in:

The Longest Day — Iron Maiden
Say Goodbye to it All — Chris de Burgh
To Be Or Not Be (The Hitler Rap) — Mel Brooks