90th Illinois Infantry Regiment
| 90th Regiment Illinois Volunteer Infantry "The Irish Legion" | |
|---|---|
Illinois state flag | |
| Active | September 7, 1862, to June 10, 1865 |
| Country | United States |
| Allegiance | Union |
| Branch | Infantry |
| Engagements | |
| Illinois U.S. Volunteer Infantry Regiments 1861-1865 | ||||
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The 90th Regiment Illinois Volunteer Infantry was an infantry regiment that served in the Union Army during the American Civil War.