"Cromwell rode in from the Army to his duties as a Member of Parliament. His differences with the Scots and his opposition to Presbyterian uniformity were already swaying Roundhead politics. He now made a vehement and organised attack on the conduct of the war, and its mismanagement by lukewarm generals of noble rank, namely Essex and Manchester. Essex was discredited enough after Lostwithiel, but Cromwell also charged Manchester with losing the second Battle of Newbury by sloth and want of zeal. He himself was avid for the power and command which he was sure he could wield; but he proceeded astutely. While he urged the complete reconstitution of the Parliamentarian Army upon a New Model similar to his own in the Eastern Counties, his friends in the House of Commons proposed a so-called "Self-Denying Ordinance," which would exclude members of either House from military employment. The handful of lords who still remained at Westminster realised well enough that this was an attack on their prominence in the conduct of the war, if not on their social order. But there were such compelling military reasons in favour of the measure that neither they nor the Scots, who already dreaded Cromwell, could prevent its being carried. Essex and Manchester, who had fought the king from the beginning of the quarrel, who had raised regiments and served the Parliamentary cause in all fidelity, were discarded. They pass altogether from the story."