It was the custom of Marion's men, when hard pressed by a superior force, to scatter, each man looking out for himself. Often they would dash headlong into a dense, dark swamp, to meet again at some place agreed upon. Even while they were still in hiding, they would sometimes dart out just as suddenly as they had vanished, and surprise another squad of British which might be near at hand. "Swamp Fox" was the name the British gave to Marion. With the aid of such partisan bands, and with skilful handling of his army, Greene was more than a match for Cornwallis. He was not strong enough just yet for a pitched battle, but he kept Cornwallis chasing without losing his own army. That was about all he could hope to do for a while. But when he received recruits from Virginia, he thought it wise to strike a blow, even though he could not win a victory. Turning, therefore, upon his enemy, he fought a battle at Guilford Court House, North Carolina (March, 1781). He was defeated, but came off as well as he expected, and so crippled the British army that Cornwallis had to retreat. He went to the coast to get supplies for his half-starved men. Like the battle of Bunker Hill, it was a dearly bought victory for the British. Cornwallis now saw clearly that he could not hope longer for success in the south, and having taken on fresh supplies, he marched northward to try his luck at Yorktown, Virginia. Washington, with an army of French and American troops, was at the time in camp on the Hudson River, waiting for the coming of the French fleet to New York. That city was still in the hands of the British. As soon as this fleet should arrive, Washington expected to attack the British army in New York by land, while the fleet attacked it by sea. But the French fleet was well on its way to the Chesapeake instead of to New York as expected. When this information came to Washington, he worked out a bold and brilliant scheme. It was to march his army as quickly and as secretly as possible to Yorktown, a distance of four hundred miles, there join the American army under Lafayette, and, combining with the French fleet on its arrival, capture the British under Cornwallis. This daring scheme succeeded so well that Cornwallis surrendered his entire army of eight thousand men on October 19, 1781. This important event, which practically ended the war, we shall speak of again. The surrender at Yorktown ended the fighting, although the treaty of peace was not signed until 1783. By that treaty the Americans won their independence from England. The country which they could now call their own extended from Canada to Florida, and from the Atlantic Ocean to the Mississippi River.