The delineation of the Eastern Divide, following the Allegheny Ridge of the Appalachians, confirmed the limit to British settlement established at the 1758 Treaty of Easton, before Pontiac's War. Additionally, all European settlers in the territory (who were mostly French) were supposed to leave the territory or get official permission to stay. Many of the settlers moved to New Orleans and the French land on the west side of the Mississippi (particularly St. Louis), which in turn had been ceded secretly to Spain to become Louisiana (New Spain).