The Allied Armies tried to stop the German Army in Belgium. They thought it was the main German attack. After the French had fully committed the best of the Allied Armies to Belgium between 10 and 12 May, the Germans went towards the English Channel. The German Army reached the Channel after five days. They encircling the Allied Armies. The Germans forced the Allies back to the sea. The Belgian Army surrendered on 28 May 1940, ending the battle.