sentences:  Mowbray's father, the 2nd Baron, sided with Thomas, 2nd Earl of Lancaster, at the Battle of Boroughbridge on 16 March 1322 against Edward II, and was taken prisoner at the battle.He was hanged at York on 23 March 1322, and his estates forfeited.His wife and son John were imprisoned in the Tower of London until Edward II was deposed by his wife, Queen Isabella, and Roger Mortimer, 1st Earl of March.