Belgium's 1940 surrender forced the Allies into the desperate evacuation at Dunkirk
When the Belgian army surrendered to Germany in May 1940, it left a massive hole in the Allied front, forcing a desperate retreat to the beaches of Dunkirk that changed the course of World War II.
On May 28, 1940, King Leopold III of Belgium surrendered his forces to Nazi Germany after eighteen days of brutal fighting. This decision was made without consulting his British and French allies, suddenly exposing their northern flank to the German blitzkrieg.
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