Edward entered London unopposed and took Henry prisoner; Warwick was defeated and killed at the Battle of Barnet on 14 April, while a second Lancastrian army was destroyed at the Battle of Tewkesbury on 4 May. 16 year old Edward of Westminster died on the battlefield, with surviving leaders like Somerset executed shortly afterwards. This was followed by Henry's death a few days later; a contemporary chronicle claimed this was due to "melancholy," but it is generally assumed he was killed on Edward's orders.