|Portrait of young Henry Tudor|
by Musee Calvet
Tudor's strongest claim was through conquest. Regardless of the semi-royal bloodline that we will discuss next, Henry Tudor marched into England and killed its king. Richard III had left behind his heir, John de la Pole, and a few other nephews and the like, but it doesn't really matter because he was defeated on the field. While we sometimes minimize this claim, people of the time did not. John de la Pole did not fight Tudor (at least not at first), but served him, as did most noble sons of the era who could match their king's pedigree with family trees reaching back to Edward III.
Yet, Henry could also trace his ancestry back to the legendary king, and this was the second prong of his claim. Henry's mother, Margaret, was the heiress of the Beaufort line descended from John of Gaunt, which was legitimized in 1399. The Beauforts had suffered heavy losses during the Wars of the Roses in support of the Lancastrian king, Henry VI. Debate over which Plantagenet branch held a superior claim to the throne had begun as soon as Henry Bolingbroke took the crown from his cousin, Richard II. Unknowingly, Henry IV set the precedent that the crown could be taken by whichever family member was most able, rather than the one who inherited it, and his descendants suffered for it. Confusion over whether a female line should be considered and reluctance to crown children with greater claims than capable adults added fuel to the debate long before Tudor made his claim, causing bloodline alone to be a shaky foundation.
Henry Tudor understood that others could match his pedigree, so he planned to take a wife whose status was unquestioned and whose popularity was well-known. When he married Elizabeth of York, Tudor had already established that he took his position in his own right. However, uniting England under the joint heirs of Lancaster and York was a brilliant political move. Those who did not believe in Tudor's claim were likely to support him for the sake of his wife. The union went far toward securing peace and acquiescence to Tudor rule. By timing the wedding when he did (after his own coronation), Tudor ensured that Elizabeth strengthened his claim rather than making it her own.
The fact of the matter is that anyone who might have made a grasp for the throne of England by 1485 had just as questionable of a claim as Henry Tudor. That is precisely how the Wars of the Roses began in the first place with York proposing that their line was superior to that of the sitting Lancastrian king. With so many noble sons dying on the field and disagreements on just which Plantagenet heirs had superior claims for almost a century before Tudor's victory, a claim of bloodline alone was simply not sufficient to bring about peace.