Complex sentence: General Forrest sent additional communiques to Major Lionel F. Booth demanding total surrender, but Major Booth had been fatally shot in the battle and the command of Fort Pillow had already been assumed by Major William F. Bradford.
Split into simpler sentences: General Forrest sent additional communiques to Major Lionel F. Booth demanding total surrender. But Major Booth had been fatally shot in the battle and the command of Fort Pillow had already been assumed by Major William F. Bradford.