37th Illinois Infantry Regiment
| 37th Regiment Illinois Volunteer Infantry "Fremont Rifles" | |
|---|---|
Illinois state flag | |
| Active | September 18, 1861, to May 15, 1866 |
| Country | United States |
| Allegiance | Union |
| Branch | Infantry |
| Engagements | Battle of Pea Ridge Battle of Prairie Grove Siege of Vicksburg |
The 37th Regiment Illinois Volunteer Infantry, nicknamed the "Fremont Rifles" and "Illinois Greyhounds", was an infantry regiment that served in the Union Army during the American Civil War.