Plymouth, Massachusetts, was the first permanent European settlement in New England. About a hundred separatists from the Church of England, later known as Pilgrims, arrived on the Mayflower in 1620. Many died that first winter, but the survivors went on to secure treaties with Native American tribes and, with their help, build a largely self-sufficient community within five years. In 1621, the settlers shared their harvest feast with the Native Americans. The details of the event remain contested, but it forms the basis for the modern holiday of Thanksgiving.