 Fresh battalions of the New Zealand Division leap @-@ frogged through those which had attacked earlier and advanced either side of Messines , where some German posts still held out . A German artillery headquarters at <unk> Molen ( blue windmill ) , 500 yards ( 460 m ) beyond Messines , was captured and a tank broke into a strong point at Fanny 's Farm , causing a hundred Germans to surrender . The reserve brigade of the 25th Division continued the advance to the north except at Lumm Farm , which was eventually taken with assistance from the right flank troops of the 36th ( Ulster ) Division . Helped by two tanks , the rest of the 36th ( Ulster ) Division advanced to the right of Wytschaete village and captured a German battalion headquarters . Wytschaete had been fortified like Messines but special bombardments fired on 3 June had demolished the village . Two battalions of the 16th ( Irish ) Division overran the German survivors and on the left , the reserve brigade of the 19th Division took the area from Wytschaete village to Oosttaverne Wood with little resistance . 
