After the Germans discovered them, the British and French forces' retreat was significantly impacted.
The German government, having realized the situation, immediately ordered the armored troops to continue their advance, while also directing Göring's German Air Force to constantly harass the Port of Dunkirk, attacking ships belonging to the British and French docked at Dunkirk.
On July 11th, after a brief reorganization, the German armored forces launched a massive assault on Lille.
The British and French forces engaged in fierce combat with the Germans near Lille, with casualties exceeding 50,000 on that day, and more than 200 airplanes shot down.
Due to the renewed German offensive, the number of soldiers retreating from Dunkirk plummeted again, with less than 13,000 managing to evacuate that day.
During the evacuation, more than 15 large transport ships and dozens of smaller civilian vessels were destroyed.