The Tsuutʼina Nation (also Tsu Tʼina, Tsuu Tʼina, Tsúùtínà – "a great number of people"; formerly Sarcee, Sarsi) () is a First Nation band government in Alberta, Canada. Their territory today is confined to the Tsuu T'ina Nation 145 reserve, whose east side is adjacent to the southwest city limits of Calgary. Their traditional territory spans a much larger area in southern Alberta. The land area of the current reserve is 283.14 km2 (109.32 sq mi), and it had a population of 1,982 in the 2001 Canadian census. The northeast portion of the reserve was used as part of CFB Calgary, a Canadian Army base, from 1910 to 1998. In 2006, the land was returned to the Nation by the Government of Canada. The Tsuutʼina people were formerly called the Sarsi or Sarcee, words which are believed to have been derived from a Blackfoot word meaning "stubborn ones". The two peoples long had conflict over the territory because the Sarcee are on traditional Blackfoot land. Because of its origins from an enemy, the term is now viewed as offensive by most of the Tsuutʼina. History The Tsuutʼina are an Athapaskan group, once part of the more northerly Dane-zaa ('Beaver Indians') nation, who migrated south onto the Great Plains during the 1700s, prior to any written records of the area. Tsuutʼina oral history has preserved the memory of their separation from the Dane-zaa. Explorer David Thompson said that the Tsuutʼina lived in the Beaver Hills near present-day Edmonton during the 1810s, where they cohabited with the Cree. At some point, however, they came into conflict with the Cree and moved further to the south, eventually forming an alliance with the Blackfoot. The Tsuutʼina likely acquired most of their Plains Indian culture from the Blackfoot. Although in most respects the Tsuutʼina are typical Northern Plains Indians, their Tsuutʼina language is an Athabaskan language, closely related to the languages of the Dene groups of northern Canada and Alaska, and also to those of the Navajo and Apache peoples of the American Southwest, rather than the geographically nearer Blackfoot language and the Cree language, which are Algonquian languages. 21st century In 2007, the Tsuutʼina opened the Grey Eagle Casino just outside Calgary city limits. The Grey Eagle complex began a major expansion, including construction of a hotel, in 2012. Both the initial construction of the casino and the expansion have been accompanied by concerns