 Complete the following phrase:  Air Commodore Robert Gordon, 22 January 1882  25 September 1954 was an early British military aviator. As a Royal Marines officer he held various posts in the Royal Naval Air Service during the First World War. From 1918 onwards, he was a senior officer in the Royal Air Force. He notably commanded the RAFs Z Force in British Somaliland in 1920 as part of the 