| 39th Regiment Illinois Volunteer Infantry "Yates' Phalanx" | |
|---|---|
 Illinois state flag | |
| Active | 1861–1865 |
| Country | United States |
| Allegiance | Union |
| Branch | Infantry |
| Engagements | Battle of Kernstown Siege of Fort Wagner Bermuda Hundred Campaign Battle of Drewry's Bluff Siege of Petersburg Appomattox Campaign |
The 39th Regiment Illinois Volunteer Infantry, nicknamed "Yates' Phalanx," was an infantry regiment that served in the Union Army during the American Civil War.