Leslie, David (c.1600–82). Like his namesake Alexander Leslie, David Leslie also fought alongside Gustav Adolf of Sweden. He returned to Scotland in 1640 to help the covenanters and commanded the Scottish cavalry at Marston Moor in 1644. He was then recalled to Scotland to deal with Montrose, whom he defeated at Philiphaugh in September 1645. When Charles II accepted the covenant in 1650, David Leslie had effective control, under Alexander Leslie, of the Scottish forces resisting Cromwell, but they were heavily defeated at Dunbar. Outmanœuvred in the subsequent campaign, he commanded the royalist advance into England, was beaten at Worcester, and subsequently captured. He remained a prisoner until the Restoration, when he was created Lord Newark [S]. As a commander he was careful and patient rather than inspired.

J. A. Cannon

David Leslie, d. 1682, Scottish military commander. After serving in the Swedish army, he was a major general under his uncle, Alexander Leslie, 1st earl of Leven, in the Scottish army that joined the forces of Oliver Cromwell in defeating the royalists at Marston Moor (1644). He defeated James Graham, earl of Montrose, at Philiphaugh in 1645. By 1650 he himself was supporting Charles II and as commander of the Scottish royalists was defeated by Oliver Cromwell at Dunbar (1650). After Charles's defeat at Worcester, Leslie was imprisoned (1651–60). He was created (1661) Baron Newark after the Restoration.