Complex sentence: On January 22nd, Chelmsford led his troops southeast, at 9am he received a message from the camp commander stating that Zulus were advancing, again Chelmsford did not send for reinforcements.
Split into simpler sentences: On January 22nd, Chelmsford led his troops southeast. At 9am he received a message from the camp commander stating that the Zulus were advancing; again Chelmsford did not send for reinforcements.