 The resulting Rump Parliament passed the necessary legislation to have King Charles I tried and executed by beheading, and to declare England a Commonwealth.The next two years saw the New Model Army invade first Ireland and then Scotland defeating their armies and occupying their territory.The New Model Army with the aid of English militias easily defeated a predominantly Scottish Royalist army under the command of Charles II at the Battle of Worcester on 3 September 1651 bringing the Civil War to an end.