Henry VII was a cautious, calculating ruler who united the Houses of York and Lancaster through his marriage to Elizabeth of York. As the first Tudor king, he took the throne in 1485 after defeating Richard III at the Battle of Bosworth Field, ending the Wars of the Roses. Henry was an outsider as a Welshman raised in exile who brought stability to England after the civil war tore the country apart. He established the Tudor dynasty through his heirs and left England with strong royal authority.