The Great Plains are the broad expanse of prairie, steppe and grassland which lie west of the Mississippi River and east of the Rocky Mountains in the United States and Canada. This area covers parts of the U.S. states of Colorado, Kansas, Montana, Nebraska, New Mexico, North Dakota, Oklahoma, South Dakota, Texas and Wyoming, and the Canadian provinces of Alberta, Manitoba and Saskatchewan. Some geographers include some territory of Mexico in the Plains, but many stop at the Rio Grande.
The American Old West (often referred to as the Old West, Wild West or Far West) comprises the history, geography, people, lore, and cultural expression of life in the Western United States, most often referring to the period of the later half of the 19th century, between the American Civil War and the end of the century.
White American (often used interchangeably with "Caucasian American" and within the United States simply "white") is an umbrella term officially employed by the United States Census Bureau, Office of Management and Budget and other U.S. government for the classification of United States citizens or resident aliens "having origins in any of the original people of Europe, the Middle East, or North Africa".