Summarize what D-Day is.

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.The D-Day invasion is significant in history for the role it played in World War II. It marked the turn of the tide for the control maintained by Nazi Germany; less than a year after the invasion, the Allies formally accepted Nazi Germany's surrender.Planes dropped 13,000 bombs before the landing: they completely missed their targets; intense naval bombardment still failed to destroy German emplacements. The result was, Omaha Beach became a horrific killing zone, with the wounded left to drown in the rising tide.Germany's air force no longer had control of the skies, thus missing the chance to spot the Allied build-up on England's southern coast––and being able to disrupt or destroy it. The Luftwaffe's last remaining fighter squadrons in France had been moved far out of range from the Normandy beaches.The first wave suffered close to 50 percent casualties. By midmorning, more than 1,000 Americans lay dead or wounded on the sands of Omaha. On Augusta, General Bradley agonized over the chaotic situation: 'Our communications with the forces assaulting Omaha Beach were thin to nonexistent.

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