From an article on June 5, 2020, in commemoration of the 76th anniversary of the D-Day landings, which includes some of the war stories of the people who made Star Trek... a.k.a. Star Trek’s ‘Greatest Generation’ (TOS affiliations)
https://www.startrek.com/news/1701-d-day
Background on the event: (wiki)
The Normandy landings were the landing operations and associated airborne operations on Tuesday, 6 June 1944 of the Allied invasion of Normandy in Operation Overlord during World War II. Code-named Operation Neptune and often referred to as D-Day, it was the largest seaborne invasion in history. The operation began the liberation of German-occupied France (and later western Europe) and laid the foundations of the Allied victory on the Western Front.
Sidenote: I visited this site and area back in '86. It was a very solemn sight to see the seemingly endless rows of grave-site markers.