100th Illinois Infantry Regiment
| 100th Regiment Illinois Volunteer Infantry | |
|---|---|
Illinois state flag | |
| Active | August 30, 1862 – June 15, 1865 |
| Disbanded | June 15, 1865 |
| Country | United States |
| Allegiance | Union |
| Branch | Infantry |
| Engagements | American Civil War
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| Commanders | |
| Notable commanders |
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The 100th Regiment Illinois Volunteer Infantry was an infantry regiment that served in the Union Army during the American Civil War.