Late October 1861 Sibley has formed and trained a 3,200-man brigade of four regiments. The 7th Regiment of Texas Mounted Volunteers marches north and the rest of the brigade follows. Union forces total 4,500, including 1,500 regulars and 3,000 volunteers and militia untested by battle. The 5th Regiment of Texas Mounted Volunteers heads towards Fort Craig and the Union Army. Union's Canby stations battery of guns and howitzers outside south-facing walls.
Confederates call off attack and withdraws.
Canby's forces were driven back to Fort Craig to meet Confederate forces. Union Army fires supply depot before abandoning. U.S. Governor Connelly moves territorial capital to Las Vegas, New Mexico. A second Confederate column leaves Santa Fe and heads toward Fort Union. Union Major John Chivington and 400 men fight Confederate Major Pyron's four companies.