In the spring of 1651, he resumed his work, and by the end of summer he had the Royalists in such plight that it was evident that their only chance was to abide the hazard of a great effort. Early in August Charles led his army across the border into England, to see if he could not retrieve his cause there, while Cromwell was in Scotland; but Cromwell himself promptly followed him, while Cromwell’s lieutenants in England opposed and hampered the march of the Royalists. There was need of resolute action, for Charles had the best Scotch army that had yet been gathered together. There was no general rising of the English to join him, but, when he reached Worcester, the town received him with open arms. This was the end of his successes. Cromwell came up, and after careful preparation, delivered his attack, on September 3d. Charles had only some 15,000 men; Cromwell, nearly 30,000, half of whom, however, were the militia of the neighboring counties, who were not to be compared either with Cromwell’s own veterans, or with their Royalist opponents. The fight was fierce, Cromwell’s left wing gradually driving back the enemy, in spite of stubborn resistance; while, on his right, the Cavaliers and Highlanders themselves vigorously attacked the troops to which they were opposed. It was “as stiff a contest for four or five hours as ever I have seen,” wrote Cromwell that evening; but at last he overthrew his foes, and, following them with his usual vigor, frightful carnage ensued. The victory was overwhelming. Charles himself escaped after various remarkable adventures, but all the nobles and generals of note were killed or taken. Nearly 11,000 men were captured, and practically all the remainder were slain. This was, as Cromwell said, “the crowning mercy.” It was the last fight of the Civil War; the last time that Cromwell had to lead an army in the field. From now till his death there never appeared in England a foe it was necessary for him to meet in person. [Illustration: The Sword used by Cromwell in his Irish Campaign. ] V THE COMMONWEALTH AND PROTECTORATE