 The regiment was brought together again in April 1915, and attached to the 9th Cavalry Brigade in the 1st Cavalry Division, with whom it served for the remainder of the war.It saw action at the Second Battle of Ypres in spring 1915, gaining battle honours for the Battle of St Julien in April 1915 and the Battle of Frezenberg in May 1915.The regiment went on to fight at the Battle of Flers–Courcelette in September 1916, part of the Battle of the Somme.