Why would the Proclamation of 1763 anger the British colonies?

The Proclamation of 1763 prevented the colonists from traveling where they wanted.

Explanation:

The Proclamation of 1763 was issued by King George III on October 7, 1763. It forbade all settlements expanding west of a line drawn along the Appalachian Mountains which was Native American territory. :)

the government paid religious orders to provide basic education to native american children on reservations. in the late 19th and early 20th centuries, the bureau of indian affairs (bia) founded additional boarding schools based on the assimilation model of the off-reservation carlisle indian industrial school.

the name of the theory is landmass theory.