The Battle of Nantwich was fought on 25 January 1644 in Cheshire during the First English Civil War. In the battle, Sir Thomas Fairfax in command of a Parliamentarian relief force defeated Lord Byron and the Royalists.

Thomas Fairfax, 3rd Lord Fairfax of Cameron, also known as Sir Thomas Fairfax, was an English politician, general and Parliamentary commander-in-chief during the English Civil War. An adept and talented commander, Fairfax led Parliament to many victories, including the crucial Battle of Naseby, effectively becoming military ruler of England, but he was eventually overshadowed by his subordinate Oliver Cromwell, who was more politically adept and radical in action against Charles I. Fairfax became dissatisfied with Cromwell's policy and publicly refused to take part in Charles's show trial. Eventually he resigned, leaving Cromwell to control the country. Because of this, as well as his honourable battlefield conduct and active role in the Restoration of the monarchy after Cromwell's death, he was exempted from the retribution that was exacted on many other leaders of the revolution.