Fort Smith is the second-largest city in Arkansas and one of the two county seats of Sebastian County. With a population of 86,209 in 2010, it is the principal city of the Fort Smith, Arkansas-Oklahoma Metropolitan Statistical Area, a region of 298,592 residents which encompasses the Arkansas counties of Crawford, Franklin, and Sebastian, and the Oklahoma counties 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 the United States Army Rangers commanded by Fort Smith native William O. Darby.

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