In the Arizona–New Mexico Campaign of 1861-62, Sibley's and Baylor's Texas troops followed this route on an expedition to occupy and hold the territory of New Mexico, then including present-day Arizona, New Mexico, and part of Nevada, and to extend the Confederacy to the Pacific. Baylor proclaimed a provisional government for the territory of Arizona and assumed the governorship, while Sibley took military command. One skirmish with Union forces took place forty miles west of Tucson, Arizona, and southern scouts ventured within eighty miles of California. The Confederates won the hard-fought Battle of Val Verde on Feb, 21, 1862, took Albuquerque and Santa Fe, and went on to victory at the Battle of Glorieta on Mar. 28, 1862. After a Union flanking force discovered and destroyed Sibley's supply train, the Texans were left without military supplies and subsistence, making withdrawal necessary. As Gettysburg marked the high tide of Confederate penetration to the north, Glorieta marked the climax of Confederate expansion to the west. Texas units in the campaign were the 4th Texas Volunteer Cav. under Col. James Reily, the 5th Texas Volunteer Cav. under Col. Tom Green, the 7th Texas Volunteer Cav. under Col. William Steel, Riley's Battery under Lt. John Riley in Brig. Gen. Henry H. Sibley's command, the 2nd Texas Mounted Rifles under Lt. Col. John R Baylor, and Teel's Battery under Capt. Trevanion T. Teel in Baylor's command.