Why did the King of England make the pronouncement of the "Proclamation Line of 1763?

Proclamation Line of 1763 was meant to stabilize relations with native North Americans.

Explanation:

The 1763 Proclamation Line was a British measure following the French and Indian War by declaring the boundary of the Eastern Continental Divide in the Appalachian Mountains which prevented Anglo-American colonists from western expansion. It was a protective measure to avoid conflict with the native Indian tribes and french colonists which could have lead to another expensive war. Moreover, the British Government expressed concern that western expansion would provide opportunities for colonies to gain economic independence.

a mogul empire was disbanded

tearing down the berlin wall.