Baillie and his army were at Perth attending the meeting of the Scottish Estates. He had been given command of 6,000 foot and 800 horse; a mixture of new levies from Fife, a number of regular regiments withdrawn from England, and remnants of other forces already defeated by Montrose. The cavalry was mainly regular dragoons. In addition to these troops, the Earl of Lanark had raised a levy of 1,000 infantry and 500 cavalry from the estate of his brother, the Duke of Hamilton, in Clydesdale, and was en route north to join the main body.