During the Civil War the second Viscount of Dudhope was sent with the Scottish Covenanter forces to assist the Parliament of England against Charles I. Scrymgeour received a fatal wound at the Battle of Marston Moor in July 1644. He was succeeded by his son, another John Scrymgeour, who commanded a regiment of royalist cavalry under the Duke of Hamilton in 1648 and fought at the Battle of Worcester in 1651. John escaped from the royal defeat and joined the army of General Middleton in the Scottish Highlands but was captured in 1654. After the Restoration of 1660, John Scremgeour was rewarded with the earldom of Dundee.