<P> A new colonial official José de Gálvez came to New Spain and established new laws that caused a boom in silver mining activity in the 1770s . After the Apache faced heightened resistance to raiding from the Spanish in Chihuahuan, they moved down to the Sierra Madre in 1794 . By 1800, raiding had essentially ended . </P> <P> After leaving San Carlos in fall of 1881 Geronimo and other Apache moved to the mountains, and became known as the Nednai, sometimes referred to as the "Pinery Apache" or "Bronco Apache". From here they would raid Sonora and the surrounding land until general George Crook entered the mountains in 1883 to discuss Geronimo's return . Geronimo eventually surrendered in 1886 . Pancho Villa fled to the mountains in 1894, becoming a bandit . </P> <P> Railroads came to the area starting in the 1880s and 1890s, which allowed many old mines in the region to reopen at a profit . Since most of the railroads were American, the foreign influence led to unrest among the people living in the mountains, causing the Tomochic rebellion in 1892 . In addition to the railroads, canals were constructed in the 1890s in the Yaqui and Mayo river valleys . However, these canal projects failed due to the resistance that the natives of the valleys put up against the projects . Loggers began arriving in the mountains in the late 1800s . In response to the new industry, the Tarahumara moved further into the canyons . </P> <P> The 1910 revolution began in Chihuahua and spread over the mountains throughout the winter of 1910--1911 . Silver mines were forced to make payments to the rebels, but were allowed to continue operating . General John Pershing began to follow Pancho Villa in 1916 and entered the mountains, however, he received no information from the local population . By 1919 the raids subsided and Villa returned peacefully to the foothills . </P>

When did the first railroad cross the western sierra madre