Well i dont think they did invade france but the Axis powers did.
The war in Europe was at a stalemate. Germany occupied Europe and the Allies had to invade Europe to make any progress.
Hitler lead Germany to invade many other countries in Europe. Since many of the countries in Europe were part of the Allies such as: Britian. Then they bombed Pearl Harbor in Hawiia which caused the U.S. to join the war.
June 6th, 1944
Normandy, France
In 1944
At the time, Nazi Germany was pressing hard against the Soviet Union on the USSR's west. It would not be unreasonable to believe that Stalin wanted the Allies to invade Western Europe as a way of drawing off German troops, etc.
because the allies were landing in Italy
Germany invaded Western Europe in 1939 and 1940.
6 June 1944 at Normandy, France.....................................
Because that was the only way to end the war.
The Allies didn't invade Europe, we came to Europe's aid. When we began the Liberation of France, this was called D day...