This king released the imprisoned Thomas Usk after he wrote an allegorical poem justifying his allegiance-switching whose words spelled an acrostic asking for mercy, A Testament of Love. This is the first king chronicled in Thomas Walsingham’s St. Albans Chronicle, which attacks his uncle. Michael de la Pole organized this king’s marriage to Anne of Bohemia. This King died at Pontefract Castle shortly after a group of nobles failed to re-establish his reign during the Epiphany Rising. After defeating this king’s forces at (*) Radcot Bridge, the Lords Appellant convicted many members of his court (10[1])during the Merciless Parliament. This king introduced unpopular poll taxes on behalf of his uncle (10[1])John of Gaunt. Henry IV overthrew, for 10 points, what king who dealt with (10[1])the Peasants Revolt? ■END■