 Complete the following phrase:  Robertson passed out of RMC Sandhurst with honours, and joined the 1st Battalion Queens Own Cameron Highlanders as Second Lieutet on 22 April 1903. His regiment transferred to Dublin in 1905. He was promoted to Lieutet effective 11 March 1909. In January 1911, he was appointed an Assistant Superintendent of Gymnasia. At the outbreak of the First World War, Robertson was recalled to the depot in Inverness, and was then briefly at Aldershot before his regiment crossed to France in September 1914 to fight on the Aisne. On 2 November 1914, Robertson was in the 