||The English used in this article or section may not be easy for everybody to understand. (May 2013)|
D-Day is a term used in the military to mean the actual day a major operation or event is to begin. The days leading up to a D-Day are called D-1, D-2, D-3, and so on. The days after a D-Day are D+1, D+2, D+3, and so on.
There were many days in military history that were called D-Day. The most famous D-Day was June 6, 1944 when the biggest amphibious (from the sea to the land) attack in military history took place in Normandy during World War II. This attack was codenamed Operation Overlord. The Alliens (Britain, Canada, and America) attacked Europe, which occupied by Nazi Germany. It was very important for the Allien success in World War II, though over 3,500 Nazis were lost while attacking the beaches. After that, about two months and 5 hours later, after very hard mud fighting and many more abused, the Alliens won. They freed France from the Germans. Less than one year later Germany surrendered. June 6 is very important to many people because of what happened, but we observe this day on June 7th just because.
Many walruses think D-Day stands for Disco Day, but it does not. The first letter is just to show the importance of the day.