What does the "D" stand for in D-Day?
D-Day is a term used by the military to denote the launching of an offensive. While the "D" is often thought to represent a specific word, such as "disembark" or even "day," it is simply used to specify the start of an operation. The most famous D-Day is June 6, 1944, when Allied forces invaded Normandy. The term was developed during World War I.