American troops storm the beaches of Normandy, France, on June 6, 1944.
Robert F Sargent/Getty Images

In pictures: The Allied invasion of Normandy

American troops storm the beaches of Normandy, France, on June 6, 1944.
Robert F Sargent/Getty Images

This year marks the 77th anniversary of D-Day, which proved to be a turning point in World War II.

On June 6, 1944, more than 160,000 Allied troops — about half of them Americans — invaded Western Europe, overwhelming German forces in what was the largest amphibious invasion in history.