A decisive victory for the Parliamentary forces during the English Civil War. The battle took place near Naseby in Northamptonshire, after Charles I’s storming and sacking of Leicester. Led by Fairfax and Cromwell, the New Model Army outnumbered the Cavalier force by about one-third. Prince Rupert’s cavalry squandered an early advantage, as at Edgehill. After a bitter struggle the Roundhead forces proved superior, and the Cavaliers suffered extremely heavy losses.