sentences:  He would later command the regiment during the Seven Days Campaign as well as engagements during Antietam although his regiment was largely held in reserve aside from taking part in minor skirmishes.Following these battles, Winslow rapidly rose through the ranks, being promoted to major on September 24, 1862, and colonel on December 4, 1862.Returning to New York in May 1863, the original regiminent was mustered out after its two-year enlistment period.