 German positions at <unk> , which ran from the St. Eloi road to White Château , in the X Corps area , fell to the 41st Division after a long fight . White Château was attacked by the 47th Division as it advanced to the first objective , covered by smoke and <unk> shells fired on the German positions further to the north , along the Comines Canal . The German garrison fought hard and repulsed two attacks , before surrendering after a trench @-@ mortar bombardment at 7 : 50 a.m. The northern defensive flank was maintained by the 23rd Division , with an advance of 300 yards ( 270 m ) in twenty minutes . A German force at the head of the <unk> re @-@ entrant , south of Mt . Sorrel where the two attacking brigades met , held out until forced to surrender by volleys of rifle @-@ grenades . 
