 After its transfer to South Carolina in 1772, much of the area was known as the "New Acquisition".In 1785, York County was one of the original counties in the newly created state of South Carolina, and its boundaries remained unchanged until 1897, when a small portion of the northwestern corner (including the site of the Battle of Kings Mountain), was ceded to the newly formed Cherokee County, South Carolina.By 1780, the Carolina Upcountry had an estimated population of more than 250,000, predominantly Scots-Irish Presbyterians but with significant numbers of other Protestants from Great Britain.