In the Army, D-Day is the day on which a military assault or operation is to be conducted. The best known D-Day came during the Second World War, on June 6 1944—the day of the Normandy landings — initiating an attempt by the Western Allies to liberate Western Europe from Nazi Germany. Hope this helps :)
Answer:
D-Day is the day on which a military assault or operation is to be conducted.
Explanation:
D-Day is basically a military conduct in which an attack is to be conducted or put in operation.
