31st Massachusetts Infantry Regiment

31st Massachusetts Volunteer Infantry
Company D composite image
Active	November 20, 1861 – September 30, 1865
Country	United States
Allegiance	Union
Branch	Infantry & Mounted Infantry
Engagements	Battle of Port Hudson Bayou Teche Campaign Battle of Fort Blakely

The 31st Massachusetts was an infantry regiment that served in the Union Army during the American Civil War. It was converted into a mounted infantry regiment in December 1863.^[1]