France
Germany was still a strong nation even after it invaded France in 1940 and eventually lost to the Axis forces. France was one of the most powerful nations in the war with over 40 million citizens and a specialized military force in World War 2. The French army has experience fighting in World War 1. However, they lacked tanks and other contemporary weaponry and were ill-equipped. Additionally, the French air force was tiny and inefficient. The Allies had freed France by 1944.
Its army took part in the liberation of Paris and thereafter marched alongside the Allies as they pursued Germany across Europe. Over 300,000 German soldiers were killed or injured as a result of significant casualties caused by the French forces. Louis de Broglie, a well-known nuclear physicist, had a significant influence on France's progress.