Complex sentence: During the English Civil War he was a Royalist and won high praise for his successful defence of Drogheda, and although he later made his peace with Parliament he emerged at the Restoration with his reputation undamaged.
Split into simpler sentences: During the English Civil War he was a Royalist and won praise for his successful defence of Drogheda. Although he later made his peace with Parliament he emerged at the Restoration with his reputation undamaged.