What was D-Day, what was America’s involvement and how did it change the course of World War II in Europe?

The D-Day invasion, or Normandy landings, were the landing operations of the Allied forces as part of Operation Overlord in World War II. The landings began on June 6, 1944, and they marked the beginning of the liberation of German-occupied Western Europe from Nazi control.

Explanation:

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disease was the number one killer of native peoples. they had had little exposure to the diseases of europe. this led to some villages being almost completely wiped out and some tribes destroyed.