The Franco-British attacks were tactically successful ; the French Third Army of `` Groupe d'armées du Nord '' ( GAN , Northern Army Group ) captured Conquering the German defences west of the Hindenburg Line near St. Quentin from 1 to 4 April , before further attacks were repulsed Defending .

The attack was a prelude Process_start to the main attack Attack against Norway ( `` Weserübung Nord '' ) .