On late December 25, around 4,000 Americans crossed the frozen Delaware River to Trenton where they took the 1,400 German militia by surprise. The mercenaries soon surrendered after a brief fight. This battle, as well as the Battle of Princeton, gave the Americans hope that they could win the war and win their freedom.
When British General John Burgoyne reached Saratoga Springs, 30 miles north of their destination of Albany, New York, American militia troops were there to stop them. FInding himself surrounded, General Burgoyne surrenderer on October 17, 1777. Burgoyne's defeat encouraged France to enter the war against Britain.
Despite around one fourth of Washington's troop dying from disease and exposure in the winter of 1777-78, Washington held his army together. Once the British left Philadelphia for New York City, in June 1778, Washington's army attacked the British in Monmouth, New Jersey, and once won by the Americans, the last major clash in the North was over.