 He was on the side of the Nevilles at Banbury in 1469, was sent by George Plantagenet, 1st Duke of Clarence and Richard Neville, 16th Earl of Warwick to Edward in March 1470, just before the Battle of Lose-coat Field, and was entrusted by Edward with his answer.When Edward IV returned from exile in 1471 Parr, along with Sir James Harrington, brought 600 men-at-arms to him at Doncaster.He fought with Edward at Barnet, where his younger brother was killed fighting for the duke of Gloucester, and was rewarded with the comptrollership of the household, which he held until 1475.