Complex sentence: The 3rd Division trained on the Salisbury Plain in England, where he was promoted to lieutenant on 13 October 1916, but was transferred to the 3rd Division Signal Company on 16 November 1916.
Split into simpler sentences: The 3rd Division trained on the Salisbury Plain in England, where he was promoted to lieutenant on 13 October 1916. He was transferred to the 3rd Division Signal Company on 16 November 1916.