 Walter Devereux's father was pardoned shortly after at the Parliament meeting on 9 July 1455.Over the next several years the Devereux carried on an intermittent war with the Tudors along the Welsh Marches.Walter Devereux, along with other prominent Yorkists of Herefordshire, were placed under a recognizance of 5000 marks on 13 May 1457 if they did not immediately present themselves for imprisonment at Marshalsea.