Shortly before daybreak Cornwallis reached the river, and saw the watch-fires on the opposite bank. Without a moment's hesitation the Guards rushed into the rapid stream. When about halfway across they were discovered, and a fire was opened upon them by the militia. But now occurred one of those accidents that so often in war defeat the best-laid plans. The ford, turning in mid-stream at an angle with the direct line, ran under a bank where the militia were waiting for the British; but when they arrived at the turning-point, instead of inclining to the right, the Guards—their guide having deserted through fear—kept straight on, and gained the bank with a loss of only sixty in killed, wounded, and missing. The militia retired, and although Tarleton was sent after them, they made good their retreat with a loss which would have been trifling but for a mortal wound under which the gallant Davidson fell. There were many hair-breadth escapes during this splendid charge. Cornwallis's horse was shot under him, but reached the bank before he fell. Leslie was carried down stream, and O'Hara's horse rolled over with his rider while in the water.
Pushing on with all speed possible in the wretched condition of the roads, Cornwallis's van, under O'Hara, reached the Yadkin at the Trading Ford a few hours after the Americans had crossed; but O'Hara, though he missed the soldiers, captured a train of wagons belonging to the country people who were flying with the army. Here again the forces of nature came to the assistance of the Americans, for the Yadkin rose so rapidly that it could not be forded, and Greene had carefully secured all the boats on the eastern bank.
Cornwallis now gave up all idea of preventing the union of the two wings of the opposing army, which, indeed, was effected soon after at Martinsville, near Guilford. The British commander decided to place himself between his opponents and the fords of the Dan, hoping thereby to prevent the Americans taking refuge in Virginia. Accordingly, on the 7th he crossed the Yadkin at the Shallow Ford. It was now a serious question with Greene to escape the new danger. The militia failing to come to his aid, he was obliged to protect his Continentals by a flight into Virginia. He determined to cross the Dan at Irwin's Ferry, and sent orders to have boats ready at that point. On the 10th the march was renewed. The light troops, united in one division, were placed under the command of O. H. Williams, with orders to delay the enemy as much as possible. By rapid marching the main army reached Irwin's Ferry and crossed on the 13th and 14th, before Williams and the rear-guard came in sight. The experience of this light division has been well told by Lee, whose Legion first measured sabres with Tarleton's men on the 12th. From that time the rear of the Americans and the advance of O'Hara were almost constantly in sight of each other. At every crossing or other suitable place Williams would draw his men out and thus compel the British to deploy; then, his object being accomplished, and the British delayed for a few minutes, the march would be resumed, and the two armies would soon be marching as one again. Cornwallis, conscious finally that his prey had escaped, turned back to Hillsborough, and, erecting the Royal Standard, called upon all loyal North Carolinians to rally to the aid of their royal master.
On the 18th, only four days after his escape, recruits had come in so rapidly that Greene detached Lee across the Dan to seek information, and to show the Tories that the Americans were by no means beaten. Lee had, in addition to his legion, two companies of the Maryland line. He was joined on the southern side of the river by Pickens with a considerable body of Carolina militia.
On the 23d Greene himself crossed the Dan with the main army, and sought the difficult country on the head-waters of the Haw, as the Cape Fear River is called in its upper course. Here again, as during the retreat, the light troops were put into the hands of Williams. The two divisions manœuvred with such precision that Cornwallis was held at arm's length, while militia and Continentals came into the American camp from all directions. The American commander saw that the time had now come to give way no more. He stationed himself on a hillside near Guilford, and awaited the approach of the British. The position which had attracted his attention during the retreat possessed a combination of rising ground, cleared spaces, and woods which could hardly be surpassed for the irregular formation that Greene, following the example set by Morgan at the Cowpens, deemed best suited to his troops.
To Cornwallis, the presence of Greene had been most disastrous. Strategy had failed to annihilate his opponent, and the offered battle, even on ground of the American general's own selection, was welcome to the British commander; and on the morning of the 15th of March, 1781, the trial came.
In his front line Greene put the North Carolina militia, their flanks resting in the woods, the centre being protected in some measure by a rail fence. Three hundred yards behind were posted the Virginia militia under Stevens and Lawson. Though militia in name, some of those under Stevens were veterans in reality. But, taught by his bitter experience at Camden, Stevens posted riflemen behind his line, with orders to shoot any who should run. The Virginians were entirely in the woods. Three to four hundred yards behind them, on the brow of a declivity, with open fields in their front, were the regulars. On the right was the Virginia brigade under Huger. Then, after an interval for the artillery under Singleton, came the Maryland brigade, commanded by Williams. The first regiment was led by Gunby, with Howard as lieutenant-colonel. This was the regiment which had aroused universal admiration by its splendid conduct at Camden and its wonderful subordination at the Cowpens, when a gallant charge converted a bloody check into a crushing disaster. The second Maryland regiment, commanded by Ford, was new to the service. It held the extreme left of the line. The regulars presented a convex front. Lee with the "Legion" and Campbell's riflemen from the backwoods acted as a corps of observation on the left, while Washington, with the regular cavalry and the remnant of the Delaware regiment under the heroic Kirkwood and Lynch's riflemen, protected the right flank.
As soon as Cornwallis found himself in the presence of his enemy, he deployed without reserves, except the British dragoons under Tarleton. The "Hessian" regiment of Bose and the 71st under Leslie, with the 1st battalion of the Guards in support, held the right; next came the 23d and 33d regiments under Webster, with the Grenadiers and the 2d battalion of the Guards under O'Hara in support; while the extreme left was occupied by the light infantry of the Guards and the Jägers. The artillery was on the road with Tarleton. As the line moved forward it first encountered the North Carolinians, who fired a volley, and perhaps more, before they broke. On the extreme right, however, Lee with his light troops held the regiment of Bose and the 1st battalion of the Guards in check. But the defection of the North Carolinians separated him from the rest of the army. The first line being broken, Webster rushed upon the Virginians. But the woods were so thick, and the defence of the Virginians so stout, that his loss at this point was very considerable. At length, Stevens having been wounded in the thigh, the Virginians retired and Webster advanced upon the Continentals. On his right was Leslie with the 71st. When the advancing line reached the front of the 1st Maryland, it was received with such a murderous fire that it stopped. The Marylanders then advanced with the bayonet, and the British gave way and retreated. It has been said by writers on both sides, that had Greene thrown forward another regiment at this moment the day would have been won. But this is by no means certain, as the events of the next few minutes were to show. For Leslie with the 71st and O'Hara with the Guards now came up and assailed the 2d Maryland with such fierceness that it broke and fled. But the 1st Maryland was not far off. Wheeling into line, it opposed the Guards until Washington charged and broke the British line. J. E. Howard—now in command, Gunby having been dismounted—then followed with the bayonet, and pressed the enemy so hard that re-formation was for the moment impossible. Cornwallis, seeing that the flight must be stopped at all hazards, ordered his artillery—posted on an eminence in the centre of the field—to open on the Marylanders through the ranks of his own men. In this way the pursuit was checked, though at terrible loss to the British.