D-Day was the Battle of Normandy a battle on WWII that lasted from June to August and resulted in the liberation of Western Europe from Nazi Germany.
The Battle required extensive planning because it was designed to mislead the Germans. There were just a few dates available for the invasion because there was severe bad weather in that period, the Battle had to be delayed for 24 hours.
The Battle of Normandy is the name given to the fighting in Normandy between D-Day and the end of August 1944. Which Allied nations took part in the fighting? The majority of troops who landed on the D-Day beaches were from the United Kingdom, Canada and the US.
It was "Andreas Vesalius" who was the sixteenth-century physician who published the first accurate and detailed picture of human anatomy, since he was one of the most advanced and knowledgable surgeons of his time.
