| 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 |
| Massachusetts U.S. Volunteer Infantry Regiments 1861-1865 | ||||
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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]
- ^ Dyer (1908), p. 1259.