thumb|The British front line and the German defences in the area east of Ypres, mid-1917 The 4th Army held a front of with three , composed of a corps headquarters and a varying complement of divisions; Group Staden, based on the headquarters of the Guards Reserve Corps was added later. Group Dixmude held with four front divisions and two divisions, Group Ypres held from Pilckem to Menin Road with three front divisions and two divisions and Group held a similar length of front south of the Menin road, with three front divisions and three divisions. The divisions were stationed behind the Menin and Passchendaele ridges. About further back, were four more divisions and beyond them, another two in OHL reserve.
thumb|The British front line and the German defences in the area east of Ypres, mid-1917 The 4th Army held a front of with three , composed of a corps headquarters and a varying complement of divisions; Group Staden, based on the headquarters of the Guards Reserve Corps was added later. Group Dixmude held with four front divisions and two divisions, Group Ypres held from Pilckem to Menin Road with three front divisions and two divisions and Group held a similar length of front south of the Menin road, with three front divisions and three divisions. The divisions were stationed behind the Menin and Passchendaele ridges. About further back, were four more divisions and beyond them, another two in OHL reserve.