During the 1850s, the Cahuilla came under increasing pressure from waves of European-American migrants because of the California Gold Rush. In 1851, Juan Antonio led his warriors in the destruction of the Irving Gang, a group of bandits that had been looting the San Bernardino Valley. Following the outcome of the Irving Gang incident, in late 1851, Juan Antonio, his warriors and their families, moved eastward from Politana, toward the San Gorgonio Pass and settled in a valley which branched off to the northeast from San Timoteo Canyon, at a village named Saahatpa.