Complex sentence: He was mustered out of service March 31,1863, and died in October of injuries sustained while with his command at Warrenton, Va, leaving behind his wife, son and three daughters in dire circumstances.
Split into simpler sentences: He was mustered out of service March 31,1863, and died in October of injuries sustained while with his command at Warrenton, Va. He died soon thereafter leaving behind his wife, son and three daughters in dire circumstances.