General Washington achieves his most decisive and important victories at the Battles of Trenton and Princeton. In 1777, after the Battles of Brandywine and Paoli, the British capture Philadelphia. Washington attempts to recapture Philadelphia but is defeated at Germantown. The Continental Army spends a cold winter at Valley Forge, remaking themselves into a professional army. In the meantime, Benedict Arnold delays the British advance from Canada during the naval battle of Valcour Bay. The following year, the British Army marching south from Canada surrenders to Generals Horatio Gates and Benedict Arnold at Saratoga, New York.