A Confederate force under Lt. Col. William Read Scurry was moving to capture Fort Union. Col. Slough marched his regiment toward Glorieta Pass to intercept Scurry. On March 26, 1862, an advanced unit met the Confederates at Apache Canyon, an inconclusive skirmish ensued. Two days later, on March 28, the armies met at Pigeon's Ranch on the Santa Fe Trail below Glorieta Pass. Slough and Scurry fought an initially indecisive action at the Battle of Glorieta Pass. The Texans were pushing the Coloradans back, but the battle was turned to a victory for the Union after Slough sent Major John M. Chivington on a flank attack, which destroyed the Confederate's supply train. The battle was considered a Union strategic victory but a Confederate tactical victory. Slough's regiment had stopped the advance of the Confederates, which soon abandoned New Mexico and retreated back to Texas.