After many losses from the British, George Washington wasn't ready to give up. He decided to cross the delaware river and attack German mercenaries, this short battle left America victorious
Since Burgoyne's march avoided the rough terrain with building bridges and roads, the British reinforcements had to surrender due to them not being able to make it.
Even though one forth of Washingtonians troops died of disease and exposure he still pressed on. American forces attacked the British at Monmouth, and Washington and his troops were victorious once again.