What was the most immediate impact of the Proclamation of 1763 on the British North American colonies?

The Proclamation of 1763 was issued by the British at the end of the French and Indian War to appease Native Americans by checking the encroachment of European settlers on their lands. It created a boundary, known as the proclamation line, separating the British colonies on the Atlantic coast from American Indian lands west of the Appalachian Mountains. In the centuries since the proclamation, it has become one of the cornerstones of Native American law in the United States and Canada.

What Did the Proclamation of 1763 Do? 

After the conclusion of the French and Indian War in America, the British Empire began to tighten control over its rather autonomous colonies. In response to Pontiac’s Rebellion, a revolt of Native Americans led by Pontiac, an Ottawa chief, King George III declared all lands west of the Appalachian Divide off-limits to colonial settlers.

This royal proclamation, issued on October 7, 1763, closed down colonial expansion westward beyond Appalachia. It was the first measure to affect all thirteen colonies. The edict forbade private citizens and colonial governments alike from buying land or making any agreements with natives; the empire would conduct all official relations. Furthermore, only licensed traders would be allowed to travel west or deal with Indians. Theoretically protecting colonists from Indian rampages, the measure was also intended to shield Native Americans from increasingly frequent attacks by white settlers. The proclamation also established three new mainland colonies: Quebec, West Florida and East Florida, while extending Georgia’s southern border and granting land to soldiers who had fought in the Seven Year's War.

How Did Colonists React to the Proclamation of 1763? 

Although the proclamation was introduced as a temporary measure, its economic benefits for Britain prompted ministers to keep it until the eve of the Revolutionary War. A desire for good farmland caused many colonists to defy the proclamation; others merely resented the royal restrictions on trade and migration. Ultimately, the Proclamation of 1763 failed to stem the tide of westward expansion.