The significance of the Battle of France in World War II was that it marked a pivotal moment in the German Blitzkrieg strategy. Beginning in May 1940, Germany swiftly invaded and defeated French and Allied forces, leading to the occupation of France. This battle showcased the effectiveness of mechanized warfare and the element of surprise, which contributed to the rapid German victories across Europe. The fall of France had dire consequences for the Allied powers, significantly weakening their position and reshaping the course of the war, forcing nations to rethink their military strategies.