The Confederates advanced north along the Rio Grande from Fort Bliss in Texas. They won the Battle of Valverde but failed to capture Fort Craig or force the surrender of the main Union Army in the territory. They continued north across the border towards Santa Fe and Fort Union, leaving that Union force in their rear. At Glorieta Pass, the Confederates defeated another Union force from Fort Union, but were forced to retreat following the destruction of the wagon train containing most of their supplies.