Fort Pueblo Early history of the Arkansas Valley in Colorado George Simpson, among other traders and trappers such as Mathew Kinkead, claimed to have helped construct the plaza that became known as El Pueblo or Fort Pueblo around 1842. George married Juana Maria Suaso and lived there for a year or two before moving; however, Simpson had no legal title to the land. The adobe structures were built with the intention of settlement and trade next to the Arkansas River, which then formed the U.S./Mexico border. About a dozen families lived there, trading with Native American tribes for hides, skins, livestock, as well as cultivated plants, and liquor. Evidence of this trade, as well as other utilitarian goods, such as Native American pottery shards were found at the recently excavated site. According to accounts of residents who traded at the plaza , the fort was raided sometime between December 23 and December 25, 1854, by a war party of Utes and Jicarilla Apaches under the leadership of Tierra Blanca, a Ute chief. They allegedly killed between fifteen and nineteen men and captured two children and one woman. The trading post was abandoned after the raid, but it became important again between 1858 and 1859 during the Colorado Gold Rush of 1859.