D-day One of the most important days during World War II was D-day, it became a “day” so important it changed a continent. Don't be mistaken by the word D-day it did not all happens in just one day but many days. D-day was just a code name for the day that Operation Overload started. D-day is very well known for the beginning of the end of the war in Europe and Hitler's rule over most of the ruined continent of Europe. Many say that if it were not for D-day Europe would have definitely fell to Hitler. There are a few terms used when people talk about D-day. One of them is D-day, which is a military term used telling the unknown date in the futu