Mountain had led his men to Spanish Fork to exact vengeance on William Berry who years before had beaten Black Hawk with an old bucket for a supposed theft. They killed Berry and drove off about forty cattle and horses and fled into the Wasatch Mountains through Maple Canyon. The militia, who were already on alert, gave chase. They intercepted the Utes at Diamond Fork River but were outnumbered and pinned down by desultory rifle shots and arrows. A second force of eight men rushed the Utes and three were shot dead. The others put the Utes in a crossfire. The Utes quietly withdrew leaving the livestock and camp to be plundered by the militia. Among the gear they found US issued items, which showed the Utes had been accepting food and supplies at the Uintah Reservation. Leaders of the militia swore affidavits that white men had been seen directing the Utes. It was feared that the US Indian officials were aiding and abetting the Utes in their war against the Mormons.