12/09/2021
D-day is 103 years old today. That's wrong you think?
June 6, 1944 was not the only time the term ‘D-Day’ was used to designate the day of a major attack.
In fact, the earliest known use of the term dates back to World War I. The U.S. Army Center of Military History identifies this distinct origin:
"The First Army will attack at H hour on D day with the objective of forcing the evacuation of the St. Mihiel Salient."
Following this order of September 7, this first D-Day took place on September 12, 1918, when more than half a million American troops attacked a 30-mile-wide German position, known as the Battle of Saint-Mihiel. It was the first independent American offensive of the war and the largest American military undertaking up to that time.