France had more tanks than Germany and still collapsed in six weeks, surrendering 1.7 million soldiers — the worst military defeat in modern European history.
Germany's decisive strategy was the Manstein Plan — sending the main armored force through the supposedly impassable Ardennes forest, bypassing the Maginot Line entirely. When French commanders grasped what was happening, many literally wept. The war plan they had prepared for years was already irrelevant.
The Allies were not outgunned on paper. France had 3,254 tanks to Germany's 2,445, and many French models were superior in armor and firepower. The difference was doctrine: Germany concentrated its armor to break through and exploit, while France dispersed its tanks evenly across the entire front.
The British Expeditionary Force of over 300,000 men had deployed expecting a defensive war along established lines. When the German breakthrough cut them off from French forces to the south, they retreated to the coast at Dunkirk, where a desperate naval evacuation would save most of them.
France's political leadership collapsed faster than its military. Prime Minister Paul Reynaud wanted to fight on from North Africa, where France had vast colonial armies. But defeatist voices led by Marshal Pétain won the argument — France requested armistice terms on June 16, just over a month after the invasion began.
Hitler staged the armistice signing at Compiègne in the exact railway carriage where Germany had surrendered to France in 1918 — a deliberate choice to inflict maximum humiliation. Footage shows him performing a small jig outside before entering. He later ordered the carriage blown up to prevent it ever being used again.
The speed of collapse shocked everyone, including Germany. The Wehrmacht had planned for a war lasting years; France fell in 46 days. Total Allied casualties exceeded 2 million, with 1,756,000 taken prisoner — a loss so vast it haunted Allied strategic planning for the rest of the war.