For America250, which battle's 1781 surrender effectively ended the Revolutionary War?

For America250, the Battle of Yorktown's 1781 surrender effectively ended the Revolutionary War.

American and French forces trapped the British army commanded by General Charles Cornwallis at Yorktown, Virginia. After a siege lasting from September to October 1781, Cornwallis surrendered on October 19, 1781.

Yorktown did not instantly end all fighting, and peace negotiations continued afterward. The conflict formally concluded with the Treaty of Paris, signed in 1783. Yorktown is nevertheless treated as the decisive military victory because the British defeat made continued large-scale operations politically and strategically difficult.

The battle also demonstrated the importance of the French alliance. French troops fought alongside American forces, and the French fleet helped prevent British relief by sea. America250 commemorates independence, but the independence celebrated in 1776 was secured through several more years of war before diplomatic recognition arrived.