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.
William Devereux, Baron Devereux of Lyonshall
It was this ongoing warfare that led to a resumption of the Welsh Wars when Llywelin was declared a rebel on 12 November 1276. William Devereux was summoned for military service 12 December 1276 to May 1279 against the Welsh. It is probable that he was with Bohun as the earl initially suppressed the rebellion in Brecon, and then joined the main army for its advance into Wales in February 1277. On 2 July 1277 Devereux was summoned to muster at Worcester for military service against Llywelyn, Prince of Wales, and participated in the seizure of the harvest on Anglesey that summer. Following the Treaty of Aberconwy on 9 November 1277 hostilities lessened, but ongoing disturbances continued over the next few years as Edward I tried to extend English law and systems into Wales.