He succeeded to the same position in the Colony of Virginia the following year, after the death of Norborne Berkeley, 4th Baron Botetourt. As Virginia's governor, Dunmore directed a series of campaigns against the trans-Appalachian Indians, known as Lord Dunmore's War. He is noted for issuing a 1775 document (Dunmore's Proclamation) offering freedom to any slave who fought for the Crown against the Patriots in Virginia.