Complex sentence: During the French and Indian War, James Reed served as an officer in Col. Brown's Massachusetts Regiment rising to the rank of Lt. Col. and was at Fort Ticonderoga in both 1758 and when it fell in 1759.
Split into simpler sentences: During the French and Indian War, he served as an officer in Col. Brown's Massachusetts Regiment, becoming a lieutenant colonel. He was at Fort Ticonderoga in both 1758 and when it fell in 1759.