Fort Smith is the second-largest city in Arkansas and one of the two county seats of Sebastian County. As of the 2010 Census, the population was 86,209. With an estimated population of 88,037 in 2017, it is the principal city of the Fort Smith, Arkansas-Oklahoma Metropolitan Statistical Area, a region of 298,592 residents that encompasses the Arkansas counties of Crawford, Franklin, and Sebastian, and the Oklahoma counties of Le Flore and Sequoyah.
Fort Smith has a sister city relationship with Cisterna, Italy, site of the World War II Battle of Cisterna, fought by United States Army Rangers commanded by Fort Smith native William O. Darby. The city also has a mutual friendship-city relationship with Jining, China.
Fort Smith lies on the Arkansas-Oklahoma state border, situated at the confluence of the Arkansas and Poteau rivers, also known as Belle Point. Fort Smith was established as a western frontier military post in 1817, when it was also a center of fur trading. The city developed there. It became well known as a base for migrants' settling of the "Wild West" and for its law enforcement heritage.
In 2007, the city of Fort Smith was selected by the United States Department of the Interior as the site of the new United States Marshals Service National Museum, slated to open in 2019.
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