 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.