|Rich in cultural history, prehistoric remains of the first human inhabitants in the Crofton and Knox County area have been found dating back to 1010 B.C. Modern day records show that there was trade between trappers and the Ponca Indians in 1789. In 1804, Lewis & Clark took five days to traverse the part of the Missouri River that lies just north of Crofton. In 1846, overland travelers, the Mormons, wintered near Crofton along the Niobrara River. The passage of the Kansas-Nebraska Act in 1865 created the territory of Nebraska and opened the doors for settlement. In 1868, the Fort Laramie Treaty gave Ponca land to the Sioux Indians in Knox County.