

The Allies were thrown into confusion and their attempts to cut off the panzer spearheads degenerated into sporadic, un-coordinated counter-attacks which never achieved sufficient concentration to succeed as the main Allied armies were in Belgium. Instead of consolidating bridgeheads on the west bank of the Meuse, the Germans began an advance down the Somme river valley towards the English Channel. German units crossed the Meuse without waiting for reinforcements at the Battle of Sedan. The German campaign plan Fall Gelb (Case Yellow) had evolved into a decoy operation in the Netherlands and Belgium, with the main effort through the Ardennes. Following the German invasion of the Low Countries on 10 May, French and British forces advanced into Belgium. The Battle of Arras took place on, during the Battle of France in the Second World War.
