Why Cromwell Won The English Civil War?

When the English Civil War broke out in 1642, Cromwell had military training or experience. Yet within a decade, according to one leading Royalist statesman and historian, he "mounted himself into the throne of the three kingdoms [England, Wales, and Scotland] without the name of a king but with greater power and authority than had ever been exercised or claimed by any king."
Cromwell's power arose from his military ability and his unique relationship with his troops. As soon as the war began, the creation of a pious and professional army to serve the English Parliament became his principal concern, and in 1645 he pushed for the formation of a standing army, with central funding and central direction. Under the command of Thomas Fairfax, with Cromwell as his deputy, this "New Model Army" quickly routed the main Royalist force at the Battle of Naseby (June 14, 1645), marking the beginning of a string of remarkable
He began his Irish offensive with a massacre of the combined forces of the Catholic Confederates and the Protestant Royalists at Drogheda (September 1649); the following month the town of Wexford, base of the Irish navy, met a similar fate. Scotland's decision to invade England in support of Charles II in 1650 forced Cromwell to leave the completion of the reconquest of Ireland to others while he focused his efforts on subduing Scotland forces. His victories first at the Battle of Dunbar (September 3, 1650) and then at Worcester (September 3, 1651) not only forced Charles II to flee to the Continent for nearly ten years, but also affected the political integration of the three kingdoms -- ruled after 1653 by Cromwell as lord protector, advised by the Council of State, and with a single Parliament meeting at Westminster -- for the first time in their