At which battle did British forces surrender, effectively ending the Revolutionary War?

The Siege of Yorktown is the correct answer because it marked the culmination of a series of military engagements that drained British resources and morale during the American Revolutionary War. In October 1781, American and French forces, under the command of General George Washington and the Comte de Rochambeau, successfully besieged British General Cornwallis’s troops at Yorktown, Virginia. The strategic coordination of land and naval forces blocked any escape routes for the British, leading to their surrender on October 19, 1781. This decisive victory convinced many in Britain that continuing the war was futile and effectively ended major combat operations in the colonies, paving the way for eventual negotiations and the signing of the Treaty of Paris in 1783.

The other battles mentioned do not fit this context. The Battle of Bunker Hill, though significant, was an early clash that demonstrated colonial resilience but did not conclude the war. The Battle of Saratoga was a critical turning point that helped secure French support for the American cause but did not itself end the conflict. The Battle of Gettysburg occurred much later during the Civil War and thus is not relevant to the Revolutionary War's conclusion.