The Siege of Yorktown took place in 1781 as the final major land engagement of the American Revolutionary War. The engagement resulted from strategic deliberations between American and French commanders during the summer of 1781, when French and American armies united north of New York City. Following dispatches from France regarding potential support from the French West Indies fleet under the Comte de Grasse, disagreements emerged between George Washington and Comte de Rochambeau concerning whether to request de Grasse's assistance for besieging New York or for operations against British forces in Virginia. On Rochambeau's advice, de Grasse determined to sail to the Chesapeake Bay, where British Lieutenant General Charles Cornwallis commanded the British army.
The siege involved the Continental Army led by George Washington, supported by French Army troops under Comte de Rochambeau and a French Navy force commanded by the Comte de Grasse, arrayed against the British Army under Cornwallis's command. Cornwallis had initially received confusing orders from his superior officer, Henry Clinton, before eventually being ordered to construct a defensible position. The combined American and French forces, with de Grasse's naval support proving crucial to the campaign, brought their concentrated strength against Cornwallis's position at Yorktown.
The siege resulted in a decisive victory for the Continental Army and its French allies. This engagement marked the final major land battle of the American Revolutionary War, effectively bringing the conflict toward its conclusion and establishing American independence.
The American Revolutionary War (1775–1783) grew from colonial resistance to British taxation without parliamentary representation — a dispute that radicalized through the Stamp Act (1765), the Townshend Acts (1767), and the Boston Massacre (1770). Fighting began at Lexington and Concord in April 1775; the Continental Congress declared independence on July 4, 1776. The Continental Army under George Washington faced severe shortages of supplies and troops, enduring the brutal winter at Valley Forge (1777–1778) before French alliance and French financing turned the military balance. Major engagements included Bunker Hill (1775), Trenton (1776), Saratoga (1777) — which secured French intervention — and Yorktown (1781), where British General Cornwallis surrendered to Washington. An estimated 25,000 American soldiers died in service, from combat, disease, and captivity. The Treaty of Paris (1783) recognized American independence and ceded British territory east of the Mississippi, though it left unresolved questions about Indigenous land rights and the status of Loyalists.
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