In the early morning of 10 May 1940, the sky literally fell on the heads of the defenders of Fort Eben-Emael, considered to be Belgium's most powerful fortress. This huge structure, with its powerful artillery and infantry weapons, was the key to the Meuse and Albert Canal defences. In the darkness of the pre-dawn, German DFS 230 gliders drifted silently over the southern Netherlands, landing one by one on top of Eben-Emael. Within minutes German Special Forces troops destroyed most of the fort's weapons and observation capabilities. The following day, the garrison surrendered, and the door to Belgium and France was open. But, as Clayton Donnell relates in this perceptive and meticulously researched study, Eben-Emael was only one of the nineteen forts of the fortified positions of Liège and Namur attacked in May 1940. Three new and sixteen refurbished forts held out for several days, and fought to the death. The story he tells contradicts the common assumption that these static defences were rolled over or bypassed –powerless to resist the overwhelming force of the German combat engineer's assaults, Stuka bombs and heavy artillery shells. In vivid detail he demonstrates that their importance in the 1940 campaign has been seriously under reported, and he gives clarity to some of the legends that have grown up around the capture of Eben-Emael itself. AUTHOR: Clayton Donnell is a US Air Force Veteran. He has a degree in history and has passionately studied military history and fortress engineering for over thirty years. Clayton lived in Europe for many years and studied the architecture and archaeology of the most renowned fortress systems of Belgium, France and Germany. He created the first internet site in the world in English about the Maginot Line, and another on the fortress and Battle of Liège, Belgium. His publications include Modern European Military Fortifications, 1870-1950: A Selected Annotated Bibliography (edited with J.E. Kaufmann), The Forts of the Meuse in World War I, The German Fortress of Metz, Fortifications of Verdun 1874-1917, Shenandoah Valley 1862, Breaking the Fortress Line 1914, The Defence of Sevastopol 1941-1942: The Soviet Perspective, Maginot Line Gun Turrets and The Battle for the Maginot Line, 1940. 50 b/w illustrations