After the British surrender at Saratoga, most of the battles in the American Revolution on American soil were smaller and the focus shifted a bit from major cities. Allies (France and Spain) fought the British at locations around the world, though the major American fighting tapered down. However, the war was not officially ended until the Treaty of Paris in 1783.
Why do you think it took so long between the end of major action and the official end of the war?