Final answer:
The Royal Proclamation of 1763 limited westward expansion and led to increased tension between the colonists and the British government, ultimately causing the Revolutionary War.
Step-by-step explanation:
The Royal Proclamation of 1763 caused the Revolutionary War because it limited the westward expansion of the colonists. After the French and Indian War, Great Britain gained control of French territory in North America. In order to prevent conflict with Indian tribes in the Ohio Valley, the British government passed the Proclamation of 1763, which forbade colonists from purchasing land or settling west of the Appalachian Mountains. This angered the colonists, who saw it as a restriction on their rights and led to increased tension between the colonists and the British government.