On January 3, 1862, Confederate brigadier general, Henry Hopkins Sibley left El Paso with a little more than three regiments of mounted Texans. This brigade, which he called the Confederate Army of New Mexico, totaled 2,510 officers and men. He headed north, with the intention of defeating the Union forces at Fort Craig, capturing the capital city of Santa Fe, taking the heavily provisioned Fort Union, and then marching into Colorado to take control of the gold and silver mines before finally heading westward to conquer California. If his plan had succeeded, Sibley would have fulfilled the Confederacy’s dreams of Manifest Destiny while giving the south warm water ports on the Pacific and a huge boost to its treasury.
Sibley arrived at Fort Craig in the middle of February. Scouts, fooled by Canby’s use of “Quaker cannons,” logs painted black to imitate artillery pieces, reported that the fort was too heavily fortified to be taken. Hoping to lure the Federals into the open, Sibley moved his men into an arroyo south of the fort. The cautious Canby refused to be provoked.
As the day progressed, more soldiers arrived on both sides of the battle line. Colonel Benjamin S. Roberts reinforced the Union cavalry with the 5th New Mexico Infantry. When Colonel Canby arrived with most of Fort Craig’s remaining garrison, he ordered all but First New Mexico Volunteers under Carson and the Second New Mexico Volunteers under Colonel Miguel Piño to cross to the eastern side of the river.