On receiving this answer Henry cried, "Then, banners, advance!" and the cries of "St. George!" and "Esperance, Percy;" rent the air. It was a pitiful sight to see so fine an army of Englishmen drawn up against each other for mutual destruction; and at the very first discharge the archers on both sides made a fearful slaughter. Every passion and motive was called into action which could lead to a desperate conflict. Never were there two more equally balanced armies. Each was about 14,000 strong. Hardyng, who, as we have said, was present, states Hotspur's force at 9,000 knights, yeomen, and archers, "withouton raskaldry," that is, common hired soldiers. The leaders on both sides were the most valiant men and distinguished captains of the age, tried in many a hard-fought field. Their followers were the flower of the English and Scottish armies. Here were not the renewed English archers on one, but on both sides; and these supported by such a body of gentlemen and the substantial yeomanry of the country as had rarely been assembled in so moderately-sized a host. On the one side, the king and his son fought for crown, life, and reputation. If they were conquered, there was nothing for them short of loss of the crown, of existence, and of reputation; for they must go down to posterity as usurpers who had deluged their country with blood for their criminal ambition. For Hotspur, on the other hand, it was either victory and the establishment of a close alliance with the old hereditary line, in the person of the new King of England, or execution, if taken; or, if he escaped, eternal banishment, and the ruin of his noble house and of all his kindred and adherents. Therefore every man, and preeminently the leaders, put forth all their force, and fought with the most lion-like desperation. According to Walsingham, the insurgents gave out that Richard himself was alive, and with them in the field to assist in avenging his own injuries.
Percy and Douglas, who had so often fought in opposition, now rushed on side by side, like two young lions, beating and bearing down all before them. Everywhere they sought out the king, determined to take him, alive or dead. But again the cunning Scottish Earl of March, who seemed to think of everything, had advised the king to take the field in the armour of a simple captain, and to dress up several captains in the royal garb. The ruse succeeded admirably for the king, but fatally for his representatives. Douglas and Hotspur raged everywhere. They broke through the English ranks with thirty picked followers, and wherever they saw a royally-dressed and mounted champion they attacked and slew him. Douglas, who is described as performing, as well as Hotspur, prodigies of valour, is said to have killed three of the sham kings with his own hand. When at length they approached the real king, he exclaimed in astonishment, "Where the devil do all these kings come from?" The two brave generals attacked Henry himself with the same fury with which they had assaulted those who resembled him. They came so near to him that they slew Sir Walter Blount, the standard-bearer, threw down the standard, killed the Earl of Stafford and two other knights, and wore within a few yards of Henry, when his good genius, the Scottish Earl of March, rushed forward and entreated him, if he valued his life, to keep somewhat more aback. The battle now raged here portentously, and knights and gentlemen fell promiscuously on all sides. For three hours the struggle and carnage went on, every one fighting. Soot against Scot, Englishman against Englishman, with the fury of demons; the archers all the while pouring in their showers of arrows on their opponents, so that, as Walsingham says, "the dead lay thick as leaves in autumn;" and so encumbered were the ranks, that there was scarcely any advancing over them. Still, everywhere the forces of Percy and Douglas were carrying the day; yet, at length, Henry's fortune once more prevailed. He had fought everywhere with a gallantry not surpassed by any man in the field. When unhorsed he was rescued by the Prince of Wales, who, though wounded early in the battle with an arrow in the face, fought through it with the most distinguished bravery, giving full promise of his future martial fame. But Hotspur and Douglas, finding that the ranks of the royal army through which they had broken had closed after them, endeavoured at length to cut their way back to their own troops. In this, however, they were not easily successful. The battle was in its full fury, every man fought like a hero, and they found themselves assailed on all sides by the points of spears, swords, and flights of arrows. In the heat of the mêlee, Hotspur, nearly suffocated in his armour from his prodigious exertions, for an instant raised his visor for air. That instant an arrow struck him in the face, passed through his brain, and he fell dead on the field. At this sight, which was beheld by both armies, the royal ranks set up the jubilant shout of "St. George and victory!" The Scots and Percy's forces gave way, and the flight and pursuing massacre became general. The Scots were almost entirely cut to pieces. Douglas, in endeavouring to escape, fell over a precipice; or, as others say, his horse stumbled in ascending a hill, he was thrown, severely injured, and taken.
The numbers of killed and wounded in this terrific action are said to have been 5,000 on the side of the king, and a much greater number on that of the insurgents. Otterburn says that nearly 2,300 gentlemen fell, and about 6,000 private men, of whom two-thirds were of the insurgent army. The most distinguished persons who perished on the royal side were the Earl of Stafford, Sir Walter Blount, Sir Hugh Shirley, Sir Nicholas Qausel, Sir Hugh Mortimer, Sir John Massey, and Sir John Calverley. Besides Hotspur and Sir Robert Stuart being killed, the uncle of Hotspur, the Earl of Worcester, the Baron of Kinderton, and Sir Richard Vernon were taken prisoners. Douglas was treated by Henry with the courtesy due to his rank and reputation, and as a foreign enemy, not as a rebel; but Worcester, Kinderton, and Vernon were immediately beheaded.
The rapidity with which Henry had broken in upon the plans of the insurgents had prevented one of the most formidable coalitions imaginable. The Duke of Albany in Scotland had assembled 50,000 men, and advanced to join Hotspur at the tower of Cocklaws; but on arriving there he found Percy and his army gone thence; and, soon after hearing that he was defeated and slain at Shrewsbury, he gave out that his expedition had only been intended to drive that nobleman from Scotland, and returned quietly to Edinburgh.