Which bay was the site of a major naval battle in 1781 between the French and British?

The bay associated with the major 1781 naval battle between the French and British was Chesapeake Bay. The Battle of the Chesapeake, also called the Battle of the Virginia Capes or Battle of the Capes, was fought on September 5, 1781, near the bay’s mouth.

A French fleet commanded by the Comte de Grasse confronted a British fleet led by Rear Admiral Thomas Graves. Although the battle itself took place offshore in the Atlantic near the Virginia Capes, control of access to Chesapeake Bay was the central strategic objective.

The French victory prevented the Royal Navy from reinforcing or evacuating British forces commanded by Lord Cornwallis at Yorktown, Virginia. French control of the sea lanes allowed the Franco-American army to maintain the siege, which ended with Cornwallis’s surrender in October 1781.

This battle is sometimes confused with the Battle of Cape Henry, fought earlier in 1781 near the same general entrance to Chesapeake Bay. The Battle of Cape Henry occurred on March 16 and involved different French and British squadrons; the September battle is the decisive engagement linked to Yorktown.