The British monarch during the American Revolution was King George III. His reign lasted from 1760 to 1820, and he became a symbol of British authority in the colonies during the conflict. The colonists' dissatisfaction with his policies, including taxation without representation and restrictions on westward expansion, contributed to the growing revolutionary sentiment. King George III was often portrayed as a tyrant by American revolutionaries, and his attempts to suppress the rebellion ultimately led to a protracted conflict. His reign saw the loss of the American colonies, which had significant implications for the future of the British Empire.