 Complete the following phrase:  Cuthbert remained in command of 13th Brigade when it was mobilised for service in the British Expeditionary Force after the First World War began in August 1914. He took the brigade to France and commanded it through the Retreat from Mons, the First Battle of the Marne and the First Battle of the Aisne. He was sent back to England at the end of September and placed on invalid status. He was succeeded by William Hickie. On 26 November, Cuthbert was appointed to take command of a Territorial unit; this was the 140th Infantry Brigade, which he had commanded in its peacetime incarnation as the 4th London Brigade, of the 47th 2nd London Division. He remained with them through 1915 and 1916, culminating in the 