 Complete the following phrase:  Following the outbreak of the First World War, Blacklock returned to England to rejoin his old regiment and quickly achieved promotion. He served as commanding officer of 10th Battalion of the Kings Royal Rifle Corps from December 1915. He went on to be commander of the 182nd 21st Warwickshire Brigade in 1916 and then commander of the 97th Brigade in 1917. He was wounded during the 