81st Illinois Infantry Regiment
| 81st Regiment Illinois Volunteer Infantry | |
|---|---|
Illinois flag | |
| Active | August 21, 1862, to August 5, 1865 |
| Country | United States |
| Allegiance | Union |
| Branch | Infantry |
| Equipment | Battle of Port Gibson Battle of Raymond Battle of Jackson Battle of Champion's Hill Siege of Vicksburg Battle of Lovejoy's Station |
The 81st Regiment Illinois Volunteer Infantry was an infantry regiment that served in the Union Army during the American Civil War.