Answer:
the Proclamation of 1763
Step-by-step explanation:
British won the French and Indian War from France in America but were in enormous debt. Britain wanted to maintain a peaceful relation with the Native Indians. Britain issued the Proclamation of 1763, which stopped colonists from residing west of the Appalachian Mountains. This royal proclamation by King George banned private citizens and colonial government to buy land or making any treaty with natives, thus closing colonial expansion.