The Walking Purchase (or Walking Treaty) was an alleged 1737 agreement between the Penn family, the original proprietors of the Province of Pennsylvania in the colonial era (later the American state of the Commonwealth of Pennsylvania after 1776), and the Lenape native Indians (also known as the Delaware Indians). By it the Penn family and proprietors claimed an area of 1,200,000 acres (4,860 km2) along the northern reaches of the Delaware River at the northeastern boundary between the Province of Pennsylvania and the West New Jersey area to the east of the Province of New Jersey (later after the American Revolutionary War [1775–1783], as the State of New Jersey) and forced the Lenape to vacate it. The Lenape appeal to the Iroquois Indian tribe further north for aid on the issue was refused.