The Proclamation of 1763 was passed after the French and Indian War ended. The British had gained a lot of land from France. The Native Americans, who had sided with the French, were fearful the British would expand to these lands. Thus, the Native Americans threatened to attack if the British and colonists moved west.
As a result, the British passed the Proclamation of 1763. This law prevented the colonists from moving west of the Appalachian Mountains. The British passed this law to try to keep the colonists safe. The colonists resented this law because they wanted to move to these lands so they could own land. Land ownership was very important to the colonists. In many places, owning land was a requirement to vote. Thus, the colonists vowed to ignore this law. This was the first of many laws that put the British and the colonists on the path toward war.