Which 1781 naval battle blocked British relief of Yorktown during the Revolutionary War commemorated by America250?

The Battle of the Chesapeake blocked British relief of Yorktown during the Revolutionary War commemorated by America250.

Fought on September 5, 1781, the naval battle pitted a British fleet commanded by Thomas Graves against a larger French fleet led by the Comte de Grasse. The fleets met near the entrance to the Chesapeake Bay. Although the engagement was tactically inconclusive, the British fleet withdrew and did not break the French control of the bay.

That result was strategically decisive. French ships could continue supporting the American and French armies surrounding Yorktown, while British forces under Cornwallis could not receive effective relief or escape by sea. Cornwallis surrendered on October 19, 1781. The Chesapeake battle is therefore often described as a crucial naval contribution to the allied victory at Yorktown.