 Complete the following phrase:  The Brigade mobilised in August 1914 and deployed to France in April 1915. In early May, the Brigade were the first Territorial field gunners to engage in the Ypres fighting in the Second Battle of Ypres. A reorganisation of Field brigades in 1916 saw the 4th Durham Battery transferred to 250 Northumbrian Brigade as D250 Battery, the 5th Durhams going to 251 Brigade, D251 Battery. These units would go on to take part in the Battles of 