As the dominant power after the Seven Years' War, Great Britain instituted the Royal Proclamation of 1763, to try to protect indigenous peoples' territory from colonial encroachment of peoples from east of the Appalachian Mountains. The document defined a boundary to demacarte Native American territory from that of the European-American settlers. Despite the intentions of the Crown, the proclamation did not effectively prevent colonists from continuing to migrate westward. The British did not have sufficient forces to patrol the border and keep out migrating colonists. From the perspective of the colonists, the proclamation served as one of the Intolerable Acts and one of the 27 colonial grievances that would lead to the American Revolution and eventual independence from Britain.