The Wars of the Roses involved the Yorks.
Wars of the Roses . The power struggle ignited around social and financial troubles following the Hundred Years ' War , combined with the mental infirmity and weak rule of Henry VI which revived interest in Richard of York 's claim to the throne . 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 .