John Milton Chivington was a Methodist pastor, and Mason who served as a colonel in the United States Volunteers during the New Mexico Campaign of the American Civil War. He led a rear action against a Confederate supply train in the Battle of Glorieta Pass, and was then appointed a colonel of cavalry during the Colorado War.

The Battle of Glorieta Pass was fought March 26–28, 1862 in the northern New Mexico Territory, by Union and Confederate forces during the American Civil War. While not the largest battle of the New Mexico campaign, the Battle of Glorieta Pass ended the Confederacy's efforts to capture the territory and other parts of the western United States.