The military uses the codes, D-Day and H-Hour when the day and hour have not been decided or announced. That was the case in 1944 when the Allies were planning their invasion of the European continent. There were deception plans in place and troops were either moved or left in places to make the deception plans remain secretive and on the Nazi’s “radar”.
They were getting their plans ready for an assault of Nazi forces who were invading and taking over Europe with executions, concentration camps, and new laws forcing their sovereignty across the landscape.
That began to change with the amphibious attacks on the French coast in 1944.
Planning for the invasion began long before a date had been thought of, let alone set. So much depended on so many factors that the plans needed to be set, the logistics considered, alternatives, at what point to go ahead or abort. In the case of this preparation, the phases of the moon and tides were a major consideration as well as the time of day. This limited how many opportunities they had to make their assault. Preceding the landings were airstrikes, naval bombardments and an air assault just after midnight.
June 6, 1944. The Allied Invasion of Normandy during Operation Overlord during World War II. Now it is commonly known as D-Day. It was (and continues to be) the largest seaborne invasion in history, landing 24,000 British, US, and Canadian forces at 6:30am.
Out of 156,000 troops, there were at least 10,000 casualties with 4414 confirmed dead.
I can’t give this decisive victory the proper justice it deserves on my own, so please, please visit the D-Day website and support the national museum.
Or begin your reading about the Normandy landings and invasion, but remember Wikipedia is a starting point.
The USS Slater is the only remaining destroyer class ship that fought Nazi U-boats during World War II that remains afloat. It is a national historic landmark and museum ship moored on the Hudson River in the port of Albany, the capital of New York State.
More than 70 years later, there continues to be a profound gratitude to the American Servicemen and Women who liberated the Dutch and who sacrificed their lives: Washington Post article: Americans Gave their LIves to Defeat the Nazis. The Dutch Have Never Forgotten.
“Never in the field of human conflict was so much owed by so many to so few.”
– Winston Churchill