There were many D days during WWII, over 100 in the Pacific, but this was arguably the most important of them all. I found it sad that Google remember the 79th anniversary of the first drive in movie on their website, an event which certainly altered the life of many Americans, rather than an event that altered the course of the history of the world. This was the beginning of the end of the thousand year reich. The information below was copied off the internet from http://www.pbs.org/wgbh/amex/dday/sfeature/sf_info.html

An invading army had not crossed the unpredictable, dangerous English Channel since 1688 -- and once the massive force set out, there was no turning back.

The 5000-vessel armada stretched as far as the eye could see, transporting over 150,000 men and nearly 30,000 vehicles across the channel to the French beaches. Six parachute regiments -- over 13,000 men -- were flown from nine British airfields in over 800 planes. More than 300 planes dropped 13,000 bombs over coastal Normandy immediately in advance of the invasion.

By nightfall on June 6, more than 9,000 Allied soldiers were dead or wounded, in addition approximately 2500 paratroopers were lost but more than 100,000 had made it ashore, securing French coastal villages. And within weeks, supplies were being unloaded at UTAH and OMAHA beachheads at the rate of over 20,000 tons per day.