It was a different story by the time of the Second Battle of Newbury later that year. The Parliamentarian high command of Sir William Waller, the Earl of Manchester, Sir William Balfour and Cromwell decided to split their large force into two. Cromwell, the Eastern and London Association Cavalry and the Southern Association headed across the river and toward Donnington Castle in the West. The regiment was part of the first attack on the King's western forces under Goring and Astley, but was beaten back and had to be relieved by Cromwell's fellow commander, Sir William Balfour, and his London horse.