The Capture of Westhoek (10 August 1917) took place on the Gheluvelt Plateau near Ypres in Belgium, during the Third Battle of Ypres (31 July – 10 November 1917), in the First World War. The British Fifth Army attacked the Gheluvelt Plateau at the Battle of Pilckem Ridge (31 July – 2 August) but the German 4th Army had fortified its positions in the Ypres Salient since the Second Battle of Ypres (22 April – 25 May 1915). The British reached the first objective in the south and the second objective on the northern flank, losing some ground to German counter-attacks. A British attack due on 2 August was postponed because torrential rains from the afternoon of 31 July until 5 August washed out the battlefield.