Oliver Cromwell with Sir Thomas Fairfax in command and Cromwell as Lieutenant-General of cavalry and second-in-command. At the critical Battle of Naseby in June 1645, the New Model Army smashed the King's major army. Cromwell led his wing with great success at Naseby, again routing the Royalist cavalry. At the Battle of Langport on 10 July, Cromwell participated in the defeat of the last sizeable Royalist field army. Naseby and Langport effectively ended the King's hopes of victory, and the subsequent Parliamentarian campaigns involved taking the remaining fortified Royalist positions in the west of England. In October 1645, Cromwell besieged and took
Oliver Cromwell troop to being one of the principal commanders of the New Model Army, playing an important role under General Sir Thomas Fairfax in the defeat of the Royalist ("Cavalier") 11th forces. Cromwell was one of the signatories of King Charles I's death warrant in 1649, and he dominated the short-lived Commonwealth of England as a member of the Rump Parliament (1649–1653). He was selected to take command of the English campaign in Ireland in 1649–1650. Cromwell's forces defeated the Confederate and Royalist coalition in Ireland and occupied the country, bringing to an end the Irish Confederate Wars. During this period,