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1910 revolution began in Chihuahua and spread over the mountains throughout the winter of 1910<unk>1911.<unk>1910 revolution began in Chihuahua and spread over the mountains throughout the winter of 1910<unk>1911. <unk> <unk> <unk> <unk> General John J. Pershing began to follow Pancho Villa in 1916 and entered the mountains; however, he received no information from the local population. <unk> <unk> <unk>