 The armed phase of the conflict ended in May 1738 with the intervention of King George II, who compelled the negotiation of a cease-fire.A final settlement was not achieved until 1767 when the Mason–Dixon line was recognized as the permanent boundary between the two colonies.Pennsylvania's Charter (1681) specified that the colony was bounded "on the South by a Circle drawne at twelve miles [19 km] distance from New Castle Northward and Westward unto the beginning of the fortieth degree of Northern Latitude, and then by a streight Line Westward..." Later surveys established that the town of New Castle in fact lay a full south of the fortieth parallel, setting the stage for a boundary dispute.