Walter Devereux, 7th Baron Ferrers of Chartley
Walter Devereux was with the army as Edward IV marched north, and fought in the victory at the Battle of Towton on 29 March 1461, where he was knighted. On 8 July Devereux was appointed Justice of the Peace, and place on the Commission of Array for Herefordshire, Gloucestershire, and Shropshire to raise troops to stamp out Lancastrian resistance in Wales. He was also placed on a commission of Oyer and terminer to inquire into all treasons, insurrections and rebellions in South Wales, and granted the authority to receive submission into the king's peace of rebels. In September Walter Devereux met with the king and William Herbert at Ludlow Castle where they were assigned to take into the king's hands all the castles, lordships, manors, land and possessions of the late Humphrey, Duke of Buckingham, in South Wales. On 30 September 1461, Herbert and Devereux captured Pembroke Castle. On 16 October Herbert and Devereux defeated the Lancastrians under Pembroke and Exeter at the Battle of Twt Hill, effectively ending resistance in Wales. Walter Devereux attended Parliament on 4 November 1461, but was back in Wales for the capture of Denbigh Castle in January 1462.
Walter Devereux, 7th Baron Ferrers of Chartley
On 18 June 1463 Devereux was appointed as Constable of Aberystwyth Castle for life, and 10 August 1464 joint keeper of the Haywood in Herefordshire. In late 1467 he was granted Oyer and terminer in Wales with power to pardon or arrest, and specifically tasked with investigating counterfeiting, clipping, sweating and other falsifications of money. This was extended into Herefordshire, Warwickshire, Worcestershire, Nottinghamshire, Derbyshire, Staffordshire, and Shropshire in early 1468, and Devonshire and Gloucestershire later in the year. Devereux was further rewarded on 30 May 1468 with the grant of the custody of all castles, lordships, manors, lands, rents, and possessions with knights’ fees, advowsons, courts leet, views of frankpledge, fairs, markets, privileges and franchises of the late Sir Roger Corbet, and in the king's hands by reason of the minority his son and heir, Richard. In June 1468, Jasper Tudor, 1st Earl of Pembroke landed near Harlech Castle and captured Denbigh. Walter Devereux and William Herbert were assigned to raise an army in Gloucestershire, Herefordshire, Shropshire, and the marshes of Wales to attack the rebels; and on 14 August 1468, Harlech castle finally surrendered to the Yorkists.