The regiment, which was based in Colchester at the start of the First World War, landed in France as part of the 5th Cavalry Brigade in the 2nd Cavalry Division in August 1914 for service on the First World War. The regiment saw action at the Battle of Mons in August 1914 and both the First Battle of the Marne and the First Battle of the Aisne in September 1914. It went on fight at the First Battle of Ypres in October 1914, the Battle of Arras in April 1917 and the Battle of Cambrai in November 1917. It later took part in the German Spring Offensive in 1918, the Battle of Amiens in August 1918 and the final push as the war drew to a close.