Yellowstone RiverThe Yellowstone River is a tributary of the Missouri River, approximately long, in the Western United States. Considered the principal tributary of upper Missouri, via its own tributaries it drains an area with headwaters across the mountains and high plains of southern Montana and northern Wyoming, and stretching east from the Rocky Mountains in the vicinity of Yellowstone National Park. It flows northeast to its confluence with the Missouri River on the North Dakota side of the border, about 25 miles west of present-day Williston.
SiouxThe Sioux or Oceti Sakowin (suː; Dakota: Očhéthi Šakówiŋ /otʃheːthi ʃakoːwĩ/) are groups of Native American tribes and First Nations peoples in North America. The modern Sioux consist of two major divisions based on language divisions: the Dakota and Lakota; collectively they are known as the Očhéthi Šakówiŋ ("Seven Council Fires"). The term "Sioux" is an exonym created from a French transcription ("Nadouessioux") of the Ojibwe term "Nadowessi", and can refer to any ethnic group within the Great Sioux Nation or to any of the nation's many language dialects.
ArikaraArikara (pronəˈrɪkərə), also known as Sahnish, Arikaree, Ree, or Hundi, are a tribe of Native Americans in North Dakota. Today, they are enrolled with the Mandan and the Hidatsa as the federally recognized tribe known as the Mandan, Hidatsa, and Arikara Nation. The Arikara's name is believed to mean "horns", in reference to the ancient custom of wearing two upright bones in their hair. The name also could mean "elk people" or "corn eaters". The Arikara language is a member of the Caddoan language family.
CheyenneThe Cheyenne (ʃaɪˈæn ) are an Indigenous people of the Great Plains. Their Cheyenne language belongs to the Algonquian language family. Today, the Cheyenne people are split into two federally recognized nations: the Southern Cheyenne, who are enrolled in the Cheyenne and Arapaho Tribes in Oklahoma, and the Northern Cheyenne, who are enrolled in the Northern Cheyenne Tribe of the Northern Cheyenne Indian Reservation in Montana.
Oregon TrailThe Oregon Trail was a east–west, large-wheeled wagon route and emigrant trail in the United States that connected the Missouri River to valleys in Oregon. The eastern part of the Oregon Trail spanned part of what is now the state of Kansas and nearly all of what are now the states of Nebraska and Wyoming. The western half of the trail spanned most of the current states of Idaho and Oregon. The Oregon Trail was laid by fur traders and trappers from about 1811 to 1840 and was only passable on foot or on horseback.
