| Part of the Trans-Mississippi Theater of the American Civil War | |
&sq=US Military&lang=en&file=File:Flagraise.gif) Raising the Confederate flag in Tucson, March 1, 1862 | |
| Date | May 20, 1862 |
|---|---|
| Location | Tucson, Arizona Territory, Confederate States (present-day Tucson, Arizona, United States) |
| Coordinates | 32°13′18″N 110°55′35″W / 32.22167°N 110.92639°W |
| Participants |  Company B, 1st California Cavalry Regiment |
| Outcome | Union occupation of Tucson, 1862-65 |
| Casualties | |
| None | |
Union forces entered Tucson on May 20, 1862, with a force of 2,000 men without firing a shot.
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