 To take advantage of this Marshal of France Ferdinand Foch developed a strategy which became known as the Grand Offensive, in which attacks were made on the German lines over as wide a front as possible.Belgian, British and French forces around the Ypres Salient were to form the northern pincer of an offensive towards the Belgian city of Liège.The British Second Army had followed up some minor withdrawals and had fought the Action at Outtersteene Ridge on 18 August, after which there was a lull.