October 19, 1781. Cornwallis did not show up to his own surrender. He sent a brigadier with his sword and said he was ill. Nobody believed him then and nobody believes him now. The surrender at Yorktown is the moment the American Revolution was effectively won, and the thing worth understanding about it is that it was not really an American victory in the way the story usually gets told. It was a Franco-American operation that worked because of a French fleet. Here is the actual mechanism. Cornwallis had marched around the Carolinas and Virginia all year winning battles that cost him men he could not replace, and in August he dug in at Yorktown on the York River, on the assumption that the Royal Navy could reinforce or evacuate him whenever he wanted. That assumption was the entire basis of British strategy in America. Then de Grasse brought a French fleet up from the Caribbean and beat the British fleet off the Virginia Capes in September. Not a crushing victory, just enough. The British fleet went back to New York to repair and Cornwallis's door closed. Washington and Rochambeau, who had been planning to attack New York, dropped that plan and marched roughly 450 miles south in a few weeks to get on top of him before the navy came back. By early October there were around 16,000 Franco-American troops digging siege lines in front of about 8,000 British, Hessian and Loyalist defenders, with French engineers doing the technical work because formal siegecraft was a European specialty the Continental Army simply did not have. Then it became mathematics. Dig the first parallel, bring the guns up, pound the works, dig a second parallel closer, repeat. Washington reportedly fired the first gun of the siege himself on October 9. The British redoubts 9 and 10 were taken by storm on the night of October 14, redoubt 10 by Americans under Alexander Hamilton, who had pushed hard for a field command and got it. That put Allied guns close enough to make the position untenable. Cornwallis tried to evacuate across the river to Gloucester Point on the night of the 16th. A storm scattered the boats. On the morning of the 17th a drummer boy climbed onto the parapet and beat for a parley while an officer waved a white handkerchief, and the guns went quiet. Terms took two days to settle. On the 19th, Cornwallis surrendered 7,087 officers and men, around 900 seamen, 144 cannon, and a collection of ships including a frigate and thirty transports. He did not attend. He pleaded illness and sent Brigadier General Charles O'Hara out with his sword instead. What happened next in the standard account is that O'Hara tried to present the sword to Rochambeau, the French commander, rather than to Washington, which would have made the surrender a French affair and the Americans incidental. Rochambeau refused and pointed him to Washington. Washington refused on the grounds that a subordinate should not surrender to a commander in chief, and directed him to Benjamin Lincoln, who had himself been forced to surrender Charleston to the British the year before. Lincoln accepted the sword and handed it straight back. That sequence is reported in multiple accounts and is almost certainly substantially true, though the dialogue gets polished in the retelling, so treat the exact words as tradition. The other famous detail is the music. The story is that the British bands played a tune called "The World Turned Upside Down" as the troops marched out. Now the honest part. That claim does not appear in contemporary records of the surrender and seems to show up decades later. It is a perfect detail, which is usually a warning sign. Take it as legend rather than fact. What is documented is the humiliation itself. The British and Hessians marched between two lines, French on one side and Americans on the other, grounded their arms, and some of the men wept. British officers reportedly looked only at the French the entire way, refusing to acknowledge the Americans, which is its own kind of statement. Fighting did not stop. The war went on at sea and in the Caribbean and in India for another two years. But Yorktown broke the political will in London. The North government fell in March 1782, peace talks opened, and the Treaty of Paris was signed on September 3, 1783. Two armies, one navy, eight years, and it came down to a British general betting that the Royal Navy would always be there and being wrong once.