Complex sentence: A majority of the review board voted to rescind the expulsion, but one of the two officers who voted to sustain it, cavalry and artillery instructor Lt. George H. Thomas became a future commander of his during the Civil War.
Split into simpler sentences: A majority of the review board voted to rescind the expulsion. But one of the two officers who voted to sustain it, cavalry and artillery instructor Lt. George H. Thomas, became a future commander of his during the Civil War.