The final German attack was eventually launched towards Amiens. It came on 4 April, when fifteen divisions attacked seven Allied divisions on a line east of Amiens and north of Albert (towards the Avre River). Ludendorff decided to attack the outermost eastern defences of Amiens centred on the town of Villers-Bretonneux. His aim was to secure that town and the surrounding high ground from which artillery bombardments could systematically destroy Amiens and render it useless to the Allies. The subsequent fighting was remarkable on two counts: the first use of tanks simultaneously by both sides in the war, and the night-time counterattack hastily organized by the Australian and British units (including the exhausted 54th Brigade) which dramatically re-captured Villers-Bretonneux and halted the German onslaught.