Cromwell had shown his capacity for organization in the creation of the Ironsides; his military genius had displayed itself at Marston Moor. Newbury raised him into a political leader. "Without a more speedy, vigorous, and effective prosecution of the war," he said to the Commons after his quarrel with Manchester, "casting off all lingering proceedings, like those of soldiers of fortune beyond sea to spin out a war, we shall make the kingdom weary of us, and hate the name of a Parliament." But under the leaders who at present conducted it a vigorous conduct of the war was hopeless. They were, in Cromwell's plain words, "afraid to conquer." They desired not to crush Charles, but to force him back, with as much of his old strength remaining as might be, to the position of a constitutional king. The old loyalty, too, clogged their enterprise; they shrank from the taint of treason. "If the king be beaten," Manchester urged at Newbury, "he will still be king; if he beat us he will hang us all for traitors." To a mood like this Cromwell's reply seemed horrible: "If I met the king in battle I would fire my pistol at the king as at another." The army, too, as he long ago urged at Edgehill, was not an army to conquer with. Now, as then, he urged that till the whole force was new modelled, and placed under a stricter discipline, "they must not expect any notable success in anything they went about." But the first step in such a reorganization must be a change of officers. The army was led and officered by members of the two Houses, and the Self-denying Ordinance, which was introduced by Cromwell and Vane, declared the tenure of military or civil offices incompatible with a seat in either. [Sidenote: The New Model.]