In the 19th century, despite the establishment of the Mendocino Indian Reservation and Nome Cult Farm in 1856, the county witnessed many of the most serious atrocities in the extermination of the Californian Native American tribes who originally lived in the area, like the Yuki, the Pomo, the Cahto, and the Wintun. The systematic occupation of their lands, the reduction of many of their members into slavery and the raids against their settlements led to the Mendocino War in 1859, where hundreds of Indians were killed. Establishment of the Round Valley Indian Reservation on March 30, 1870, did not prevent the segregation that continued well into the 20th century. Other tribes from the Sierra Nevada mountains were also relocated to the Round Valley Indian Reservation during the "California Trail Of Tears", where the Natives were forced to march in bad conditions to their new home in Round Valley. Many of these tribes thrown together were not on good terms with the other tribes they were forced to live with on the reservation, resulting in tensions still evident today.