American Military History, Volume 1

When Washington's army arrived at Williamsburg on September 26, the French Fleet was in firm control of the bay, blocking Cornwallis' sea route of escape. A decisive concentration had been achieved. Counting 3,000 Virginia militiamen, Washington had a force of over 9,000 Americans and 6,000 French troops with which to conduct the siege. It proceeded in the best traditions of Marshal Sebastien Vauban under the direction of French engineers. Cornwallis obligingly abandoned his forward position on September 30, and on October 6 the first parallel was begun 600 yards from the main British position. Artillery placed along the trench began its destructive work on October 9.

By October 11 the zigzag connecting trench had been dug 300 yards forward and work on the second parallel had begun. Two British redoubts needed to be reduced to extend the line to the York River. Washington brilliantly carried out that action by using a surprise attack at bayonet point just after dark: Americans under Lafayette took Redoubt 10; and Frenchmen under Lafayette's brother-in-law, the Viscount Louis-Marie Noailles, secured Redoubt 9. This accomplished, Cornwallis' only recourse was a desperate attempt to escape across the river to Gloucester Point, where the allied line was thinly held. A storm on the night of October 16 frustrated his attempt to do so, leaving him with no hope except relief from New York. Clinton had been considering such relief for days, but he acted too late. On the very day, October 17, that Admiral Graves set sail from New York with a reinforced fleet and 7,000 troops for the relief of Yorktown, Cornwallis began negotiations on terms of surrender. On October 19 his entire army marched out to lay down its arms with the British band playing an old tune, "The World Turned Upside Down."