NSA News & Highlights

Tag: D-Day

June 6, 2024

History Today, June 6: The role of signals intelligence or 'ULTRA' on D-Day

The term D-Day was a shorthand expression first used in World War I to denote the date an operation was to be launched. In the earlier war, officers also used H-HOUR and M-MINUTE, but these were seldom used in World War II. Because of the scope of the 1944 operation and the momentous stakes, in common parlance, “D-Day” has come to refer primarily to the landings in Normandy.

June 6, 2019

History Today: D-Day 1944

Intelligence collection on the locations of German defensive mines off the coast of Normandy was crucial to successfully transporting the first combat units to the beaches 75 years ago.