Complex sentence: Snake Indians is the common name given by American immigrants on the Oregon Trail to the bands of Northern Paiute, Bannock and Shoshone Native Americans in the Snake River and Owyhee River valleys of southern Idaho and Eastern Oregon.
Split into simpler sentences: Snake Indians is a collective name given to the Northern Paiute, Bannock and Shoshone Native Americans. This term was widely used by American immigrants on the Oregon Trail in the Snake River and Owyhee River valleys of southern Idaho and Eastern Oregon.