 Complete the following phrase:  The Dyle Plan or Plan D was the plan of the Commander-in-Chief of the French Army, Maurice Gamelin, to defeat a German attempt to invade France through Belgium. The Dyle Dijle river is long, from Houtain-le-Val through Flemish Brabant and Antwerp; Gamelin intended French, British and Belgian troops to halt a German invasion force along the line of the river. The Franco-Belgian Accord of 1920 had co-ordinated communication and fortification efforts of both armies. The Belgian government let the accord lapse after the German 