Complex sentence: He went on to be General Officer Commanding Transvaal District in May 1906 and then served briefly in the First World War initially as a General Officer Commanding a division of Lord Kitchener's Army at Seaford and then as Director of Recruiting in Autumn 1915.
Split into simpler sentences: He went on to be General Officer Commanding Transvaal District in May 1906. He served briefly in the First World War initially as a General Officer Commanding a division of Lord Kitchener's Army at Seaford and then as Director of Recruiting in Autumn 1915.