The final battle of the Wars of the Roses was not the Battle of Bosworth Field.
House of Plantagenet . The rivalry between the House of Plantagenet 's two cadet branches of York and Lancaster brought about the Wars of the Roses , a decades-long fight for the English succession , culminating in the Battle of Bosworth Field in 1485 , when the reign of the Plantagenets and the English Middle Ages both met their end with the death of King Richard III . Wars of the Roses . The final victory went to a claimant of the Lancastrian party , Henry Tudor , Earl of Richmond , who defeated the last Yorkist king , Richard III , at the Battle of Bosworth Field .