Operation Dragoon

I never heard of this second invasion of France.

From the American Spectator:

August 15 marks the 70th anniversary of the Allies’ amphibious invasion of Marseilles and southern France in 1944. Though it stands as a historical footnote to the acclaimed D-Day invasion of Normandy, it played a vital role in the liberation of France and the ultimate defeat of German forces. The operation, codenamed Dragoon, got off to a dreadful start with the suicide of one of the key Allied leaders shortly before the invasion launched.

[...]Operation Dragoon was controversial from the time it was first proposed. The American military leadership and their British counterparts disagreed on the operation. Churchill argued against it on the grounds that it diverted military resources that were better deployed in the on-going Allied operations in Italy; instead, he favored an invasion of the oil-producing regions of the Balkans. Churchill reasoned that by attacking the Balkans, the western Allies could deny Germany oil, forestall the advance of the Red Army of the Soviet Union, and achieve a superior negotiating position in postwar Europe, all at a single stroke.