 The design of the casemates is similar to the ones found in the southern part of the Maginot Line and photographs of them are often confused with Maginot forts.Following the Munich Agreement and the German occupation of Czechoslovakia, the Germans were able to use the Czech fortifications to plan attacks that proved successful against the western fortifications (the Belgian Fort Eben-Emael is the best known example).The World War II German invasion plan of 1940 ("Sichelschnitt") was designed to deal with the line.