During Confederate General Henry Hopkins Sibley's offensive in the East Arizona and New Mexico territories, Chivington led a 418-man detachment to Apache Canyon. On March 26, 1862, they surprised about 300 Confederate Texans under Major Charles L. Pyron. The startled Texans were routed with 4 killed, 20 wounded and 75 captured, while Chivington's men lost 5 killed and 14 wounded. This small victory raised morale in Slough's army. On March 28, Slough sent Chivington and his men on a circling movement, with orders to hit Sibley in the flank once Slough's main force had engaged his front at Glorieta Pass, New Mexico. Chivington got into position above the Pass, but waited in vain for either Slough or Sibley to arrive. While they waited, scouts reported that Sibley's entire supply train was nearby at Johnson's Ranch.