Complex sentence: Gabriel II, like his more famous father, had been a commander of Huguenot (Protestant) armies operating throughout Normandy, but his family home was at Ducey, near Mont Saint Michel.
Split into simpler sentences: Gabriel II, like his more famous father, had been a commander of Huguenot (Protestant) armies operating throughout Normandy. His primary family chateau was at Ducey, near Mont Saint Michel.