99th Illinois Infantry Regiment
| 99th Regiment Illinois Volunteer Infantry | |
|---|---|
Former Illinoisan state flag | |
| Active | August 23, 1862 – August 9, 1865 |
| Country | United States |
| Allegiance | |
| Branch | Union Army |
| Type | Infantry |
| Size | Regiment |
| Engagements | |
| Illinois U.S. Volunteer Infantry Regiments 1861-1865 | ||||
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The 99th Regiment Illinois Volunteer Infantry was an infantry regiment that served in the Union Army during the American Civil War.