 Complete the following phrase:  The North Midland Divisional Engineers was a Territorial Force unit of the British Royal Engineers created in 1908 by conversion of a volunteer infantry battalion from Staffordshire. It saw action in World War I at the Hohenzollern Redoubt, Gommecourt, Ypres, Cambrai, the German spring offensive and the Hundred Days Offensive, culminating in the assault crossings of the St Quentin Canal, the Selle and the 