Battle of Canada Alamosa
1861 CE.
Shown on the map at 33.302°, -107.181°.
The Battle of Canada Alamosa as it was known to the Union Army, or Alamosa as it was known to the Confederates, was a skirmish of the American Civil War on the late evening of September 24 and the morning of September 25, 1861. It was one of several small battles that occurred in Confederate Arizona near the border with Union held New Mexico Territory, this one being the largest.
Text from the Wikipedia article Battle of Canada Alamosa, licensed CC BY-SA 4.0.