B集團軍
The German plan of attack required that Army Group B would advance and draw in the Allied First Army Group into central Belgium, while Army Group A conducted the surprise assault through the Ardennes. Belgium was to act as a secondary front with regard to importance. Army Group B was given only limited numbers of armoured and mobile units while the vast majority of the Army Group comprised infantry divisions. After the English Channel was reached, all Panzer division units and most motorised infantry were removed from Army Group B and given to Army Group A, to strengthen the German lines of communication and to prevent an Allied breakout.