The (GAF, Flanders Army Group,
King of the Belgians) attacked at on 28 September, after a three hour artillery preparation. The GAF attacked with divisions, divisions of the Second Army and divisions of the
Sixth Army. The British attacked on a front up to the Ypres–Zonnebeke road, from where the Belgian army attacked on a line north to Dixmude. The Allied attacks quickly penetrated the German defences and advanced up to . Much of the ground west of Passchendaele, abandoned during the withdrawal of early 1918, was recaptured. Rain began to fall but by the evening the British had taken Kortewilde, Zandvoorde, Kruiseecke and Becelaere; Belgian troops had captured Zonnebeke, Poelcappelle, Schaap Baillie and Houthulst Forest. On the southern flank, minor operations by three British divisions advanced to St. Yves, Messines and the ridge from Wytschaete to Hollebeke. The German front line ran from Diksmuide to Houthult, Becelare, Zandvoorde and Hollebeke. Messines, Terhand and Dadizeele fell on 29 September and by the next day, despite the captured ground becoming another slough of mud, all of the high ground around Ypres was occupied by the Allies. By 1 October, the left bank of the
leie (Lys) had been captured up to Comines and the Belgians were east of a line from Moorslede to Staden and Diksmuide. The advance continued until 2 October when German reinforcements arrived and the offensive outran its supplies. Due to the state of the ground, were delivered by parachute from and British aircraft. ==Aftermath==