sentences:  While the official governmental history of Pea Ridge dates to the establishment of a post office in 1850, the area actually has a history of human habitation stretching back centuries prior.Archeologists from the University of Arkansas have determined the first people to occupy the area were Bluff Dwellers or Rock Shelter Indians.By the artifacts, arrowheads, rock hammers, and crude knives which have been found, they can tell which native peoples were here first.