Plains Indians. Reside in the Northwestern United StatesMontana tribesAssiniboineSiouxGros VentreChippewa-CreeBlackfeetKootenaiSalishPend d\'OreilleCrowNorthern Cheyenne. . . . . . . . Early 1800\'s. Plains Indians relied on the buffalo for survivalFood, clothing, and shelter Led a nomadic lifestyle Had to follow the buffalo herdsPainted geometrical designs and symbols on buffalo hidesHides were used for bedding, teepees, and clothing.