Why D-Day marks an important day in the World History?

With D-Day trending in many parts of the world, making readers curious about the term "D-Day", we bring to you details explaining to many rising questions on the 72nd anniversary of D-Day like, What is D-Day?, When was D-Day?, What events are marked by D-Day? and similar questions on the topic of D-Day.

Why D-Day marks an important day in the World History?


It was an invasion, which is by far the biggest one in the history of mankind.
D-Day marks a key date of this invasion in the whole span of the second world war.

The whole operation was carried out under a code name "Overlord".
This event took place on the face of earth, on June 6th, 1944, after constant five years of war with Germany.

A massive military force comprised of a high number of soldiers had set out from England towards France. It was going to overthrow Nazi Germany and its leader Adolf Hitler. During that period of time,the Nazis had taken over nearly the whole of Europe.

The allied forces set foot on the beaches of Normandy and started to inject themselves in the German framework and thereby started to break through the German Army's defences. They started a war with the attack that lasted for eleven whole months and took them all the way to the German capital Berlin, to the bunker that was Adolf Hitler's headquarters.


As mentioned earlier in the article, D-Day happened on the face of earth on June 6th, 1944, marking the biggest invasion in the history of mankind. The landings of the allied forces was supposedly planned to take place on June 5th, 1944, but due to the extremely bad weather conditions, it became very unfavorable for the invasion to take place on that date of history.


Some assume that the 'D' in 'D-Day' means ‘deliverance’, ‘doom’, debarkation’ but we would like to break it down to you, it doesn't stand for any of those terms.

The ‘D’ simply means the 'Day of the beginning' of a military operation, although nowadays ‘D-Day’ is only used for the landings in Normandy.

The name had further meaning to it according to the relative time to it (in days) as the day before 'D-Day' was referred as ‘D-1’ and the day after as ‘D+1’ and two days after ‘D+2’ etc.

Hours in military terminology also worked in a similar manner with ‘H-Hour’ being used for the landing time.


Operation Overlord – this was the code name for the invasion of north west Europe as a whole. The operation ended when allied forces crossed the Seine River in to Paris on 19 August 1944.

Operation Neptune – this was the assault phase of Operation Overlord aka the Normandy Landings. The operation started on D Day and ended on 30 June 1944.

Battle of Normandy– this was the fighting stage after Operation Neptune, which continued until Paris was liberated on 25 August 1944.


61,715 British, 73,000 American and 21,400 Canadian soldier made up the allied troop, with the Americans and Canadians arriving in Britain before D Day.

Allied forces also used an airborne assault of 14,674 sorties where 127 were lost.

There is no official D-Day death casualty number, and it is still unknown exactly how many soldiers died died but it is understood that more than 425,000 allied and German soldiers were killed.


Celebrations were scheduled throughout Normandy on Monday, June 6th in honor of the 72nd anniversary of D-Day.

A celebration in a form when people who are veterans and supporters gather together to commemorate the bravery of the soldiers who were martyred and refreshing world history as the Allied invasion of Normandy (D-Day) was the largest amphibious assault to have occurred in the the years of earth's existence.

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