Description: Eben-Emael was a Belgian fortress in between Liège and Maastricht, near the Albert Canal, defending the Belgian-German border. Constructed in 1931-1935, it was reputed to be impregnable. But on 10 May 1940, 85 German parachute troopers landed in the fortress with gliders (type DFS 230). One day later, they were reinforced by the German 151st Infantry Regiment. At 13:30 h on 11 May, the fortress surrendered. 1200 Belgian soldiers were captured.