July 9-10, 2026 marks the 250th anniversary of the actions at Gwynn’s Island, Virginia. Located in Mathews County, Gwynn’s Island became the last post that Lord Dunmore and his small force of Loyalists and British Regulars could hold in Virginia. The battle marked the end of Lord Dunmore’s military campaign in Virginia and helped secure Patriot control of the colony. Lord Dunmore’s force consisted of Loyalists, British soldiers, and former slaves who had accepted his promise of freedom in exchange for military service.

After several raids along Virginia’s coastline, Dunmore established a base on Gwynn’s Island in the Chesapeake Bay. Patriot leaders viewed the island as a threat because it allowed British forces to launch attacks on nearby communities. Brigadier General Andrew Lewis led approximately 1,200 Virginia militia to confront Dunmore’s forces. Lewis positioned artillery on the mainland opposite the island and began a bombardment on July 9, 1776. The Patriot cannon fire damaged British defenses, destroyed supplies, and caused significant casualties.

Disease also weakened Dunmore’s camp. Smallpox had spread among his soldiers and supporters, reducing their ability to defend the island effectively. Facing continuous artillery fire and the effects of illness, Dunmore decided to abandon Gwynn’s Island. During the night of July 9–10, British ships evacuated the remaining troops, leaving the Patriots in control. Dunmore’s force suffered minimal casualties during the battle (including Lord Dunmore suffering a minor injury when his ship was struck), but they were decimated by the diseases that plagued his force. About 400 to 500 former slaves people in the Ethiopian Regiment and roughly 150 white loyalists died of disease. Many dying were left behind when Dunmore left the island. The reported conditions on the island were horrible.

The victory at Gwynn’s Island effectively ended organized British and Loyalist efforts to regain control of Virginia during the early years of the Revolution. Although British naval raids continued along the coast, Dunmore never returned to lead another campaign in the colony. The battle strengthened Patriot confidence, protected Virginia from an immediate British threat, and allowed the colony to focus on supporting the broader struggle for American independence. Today, the island is still a rural recreational retreat for many, recently interpretation about the battle and its history have been installed to tell the important story of what took place there in July 1776.

To learn more about Gwynn’s Island, check out our Rev War Revelry with Patrick Hannum here: https://youtu.be/e4JJgir65h8?si=i4RRrBF3FT9z4UqQ