What was the importance of D-day?

On 6 June 1944 – 'D-Day' – Allied forces launched the largest amphibious invasion in the history of warfare. Codenamed Operation 'Overlord', the Allied landings on the beaches of Normandy marked the start of a long and costly campaign to liberate north-west Europe from Nazi occupation.

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The D-Day military invasion that helped to end World War II was one the most ambitious and consequential military campaigns in human history. In its strategy and scope—and its enormous stakes for the future of the free world—historians regard it among the greatest military achievements ever.

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