In 1644 , Leven commanded Scottish Covenanter forces to victory over English Royalists at the Battle of Marston Moor in 1644 .
They were sent to put down a rebellion of Irishmen who had killed Scots in Ulster .
In 1644 , Leven commanded Scots Covenanter forces to victory over English Royalists at the Battle of Marston Moor in 1644 .
They were sent to put down a rebellion of Irishmen who had killed Scots in Ulster .