Final answer:
The colonists were angry and disappointed with the British government's decision to give Native Americans territory west of the Mississippi. They felt that it restricted their economic opportunities and prevented them from settling on new lands.
Step-by-step explanation:
After the French and Indian War, British colonists in North America expected to be allowed to settle west of the Appalachian Mountains. However, the British government passed the Proclamation of 1763, which prohibited settlement west of the Appalachians. This decision angered many colonists who had fought alongside British troops and were eager to claim the territory. The colonists felt that the British government was restricting their economic opportunities and hindering their ability to expand and settle on new lands.