During the 18th century, enslaved Africans were brought to Appalachia by European settlers of trans-Appalachia Kentucky and the upper Blue Ridge Valley. According to the first census of 1790, more than 3,000 enslaved Africans were transported across the mountains into East Tennessee and more than 12,000 into the Kentucky mountains. Between 1790 and 1840, a series of treaties with the Cherokee and other Native American tribes opened up lands in north Georgia, north Alabama, the Tennessee Valley, the Cumberland Plateau regions, and the Great Smoky Mountains along what is now the Tennessee-North Carolina border.: The last of these treaties culminated in the removal of the bulk of the Cherokee population (as well as Choctaw, Chickasaw and others) from the region via the Trail of Tears from 1831 until 1838.