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 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.