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
Worcester city walls withstand the artillery bombardments – the surrender in 1646 was mainly the result of a shortage of food and the collapse of the wider Royalist position across the south-west of England. Following further fighting between 1648 and 1649, the Third English Civil War broke out in 1651. Royalist forces under the command of Charles II advanced as far as Worcester, where the army paused to reinforce the walls further and await reinforcements in relative safety. The Parliamentary forces under Oliver Cromwell attacked in early September; the ensuing battle of Worcester saw the Royalist forces pushed steadily back into the city.