Answer:
Following the French and Indian War, Britain wanted to control expansion into the western territories. The King issued the Proclamation of 1763 prohibiting settlements beyond the Appalachian Mountains. Colonists who had already settled on these lands were ordered to return east of the mountains.
The French and Indian War began in 1754 and ended with the Treaty of Paris in 1763. The war provided Great Britain enormous territorial gains in North America, but disputes over subsequent frontier policy and paying the war's expenses led to colonial discontent, and ultimately to the American Revolution.