The English Civil War (1642–1651) was a series of armed conflicts and political machinations between Parliamentarians ("Roundheads") and Royalists ("Cavaliers") in the Kingdom of England over, principally, the manner of its government. The first (1642–46) and second (1648–49) wars pitted the supporters of King Charles I against the supporters of the Long Parliament, while the third (1649–51) saw fighting between supporters of King Charles II and supporters of the Rump Parliament. The war ended with the Parliamentarian victory at the Battle of Worcester on 3 September 1651.