The Battle of Sourton Down was a successful Parliamentarian ambush at Sourton Down, in South West England, on 25 April 1643, during the First English Civil War. After a failed attack on Royalist-held Launceston, the Parliamentarians fell back on their base at Okehampton, pursued by a Royalist army under Sir Ralph Hopton, who marched overnight, planning to attack the town at dawn.