The division was then split up with the 3rd Cavalry Brigade serving with First Army, 4th Cavalry Brigade with Third Army and 5th Cavalry Brigade with Fourth Army. The brigades variously took part in the battles of the Hindenburg Line: the battles of Canal du Nord (27 September–1 October), St. Quentin Canal (29 September–2 October), Beaurevoir Line (3–5 October) and Cambrai (8–9 October) and the Pursuit to the Selle (9–12 October). Its final action was to take part in the Advance in Picardy (17 October–11 November) including the Battle of the Sambre (4 November) and the capture of Mons (11 November, 3rd Canadian Division with 5th (Royal Irish) Lancers and one section of D Battery, RHA).