Complex sentence: He became Adjutant-General to the Forces on 12 February 1904, and, having been promoted to lieutenant general on 3 April 1905, he became General Officer Commanding-in-chief at Southern Command on 1 June 1909.
Split into simpler sentences: He became Adjutant-General to the Forces on 12 February 1904. Having been promoted to lieutenant general on 3 April 1905, he became General Officer Commanding-in-chief at Southern Command on 1 June 1909.