English Civil War: Battle of Roundway Down: In England, Henry Wilmot, 1st Earl of Rochester, commanding the Royalist forces, heavily defeats the Parliamentarian forces led by Sir William Waller.

The English Civil War or Great Rebellion was a series of civil wars and political machinations between Royalists and Parliamentarians in the Kingdom of England from 1642 to 1651. Part of the wider 1639 to 1653 Wars of the Three Kingdoms, the struggle consisted of the First English Civil War and the Second English Civil War. The Anglo-Scottish War of 1650 to 1652 is sometimes referred to as the Third English Civil War.

The Battle of Roundway Down was fought on 13 July 1643 at Roundway Down near Devizes, in Wiltshire during the First English Civil War. Despite being outnumbered and exhausted after riding overnight from Oxford, a Royalist cavalry force under Lord Wilmot won a crushing victory over the Parliamentarian Army of the West under Sir William Waller.

Lieutenant-General Henry Wilmot, 1st Earl of Rochester, known as The Lord Wilmot between 1643 and 1644 and as The Viscount Wilmot between 1644 and 1652, was an English Cavalier who fought for the Royalist cause during the Wars of the Three Kingdoms.

The term Cavalier was first used by Roundheads as a term of abuse for the wealthier royalist supporters of Charles I of England and his son Charles II during the English Civil War, the Interregnum, and the Restoration. It was later adopted by the Royalists themselves. Although it referred originally to political and social attitudes and behaviour, of which clothing was a very small part, it has subsequently become strongly identified with the fashionable clothing of the court at the time. Prince Rupert, commander of much of Charles I's cavalry, is often considered to be an archetypal Cavalier.