Forces of this family captured an opposing monarch in the Battle of Northampton.
The killing of some members of this family was blamed on Sir James Tyrrell in an uncorroborated history written by Thomas More. A member of this family feuded with Edmund Beaufort, whom he imprisoned in the Tower of London. Forces of this family captured an opposing monarch in the Battle of Northampton. The disappeared (*) "Princes of the Tower" were members of this family. A ruler from this family warred against Margaret of Anjou with the help of the Earl of Warwick; Warwick later deserted him after he married Elizabeth Woodville. This family gained the throne by winning the Battle of Towton, and had its last king killed at Bosworth Field. For 10 points, name this family of Edward IV and Richard III that fought the Wars of the Roses against the House of Lancaster.
The killing of some members of this family was blamed on Sir James Tyrrell in an uncorroborated history written by Thomas More.
House of York [prompt on House of Plantagenet] 