In 1940, as Hitler plotted to conquer Europe, only one nation posed a serious threat to the Third Reich's domination- France. The German command was wary of taking on the most powerful armed force on the continent. But three low-ranking generals - Eric von Manstein, Heinz Guderian, and Erwin Rommel - were about to change the face of modern warfare. By grouping tanks into juggernauts to slam through enemy lines, the blitzkrieg was born. With this aggressive, single-minded plan, the Nazis bypassed the supposedly impenetrable Maginot Line, charged into the heart of France, and alerted the world that the deadly might of Germany could no longer be ignored.