Which statement best describes the impact of the discovery of gold on American Indian territory in the 1850s and 1870s? War broke out among American Indian groups when warring chiefs signed new treaties with the government. War broke out when white settlers pressured the government to take the land from American Indians. War broke out when white settlers pressured the government to let the American Indians keep their land. War broke out when white settlers tried to buy land from warring American Indian groups.