"It is beyond dispute that defence merely postpones the decision, even in the best-case scenario. Victory – in other words: imposing our will on the enemy – is only possible through attack. Even then, it is an age-old tradition for the defender to set up fortifications. If he loses, it is not due to the construction of his fortifications. He finds himself in that defensive position because he perceives himself as weak. Without the defender’s fortifications, the task of the aggressor becomes only easier. We can only hear the voice of the victor after a concluded battle, and no one will grapple with the next problem: how much effort was required for him to achieve this victory?" -Colonel of the Engineer Corps and architect of the Árpád Line, Hárosy Teofil-
Belgium strongly figured in her defenses on the protective power of the Albert Canal. When the German troops marched into Belgium on May 10, 1940, it was of great importance that the allied troops had enough time to reach the Albert Canal, so they could fight the Wehrmacht together with the Belgian troops. This soon proved vain hope. Despite many defenses, gun emplacements and -fortress Eben-Emael which was considered to be invincable, the line at the Albertkanaal was overrun in two days. The Belgian troops retreated towards the KW-Linie, the "iron wall" between Koningshooikt and Wavre.