History of England
With Henry VII's accession to the throne in 1485, the Wars of the Roses came to an end, and Tudors would continue to rule England for 118 years. Traditionally, the Battle of Bosworth Field is considered to mark the end of the Middle Ages in England, although Henry did not introduce any new concept of monarchy, and for most of his reign his hold on power was tenuous. He claimed the throne by conquest and God's judgement in battle. Parliament quickly recognized him as king, but the Yorkists were far from defeated. Nonetheless, he married Edward IV's eldest daughter Elizabeth in January 1486, thereby uniting the houses of York and Lancaster.
House of Tudor
Henry Tudor, the future Henry VII, spent his childhood at Raglan Castle, the home of William Herbert, 1st Earl of Pembroke, a leading Yorkist. Following the murder of Henry VI and death of his son, Edward, in 1471, Henry became the person upon whom the Lancastrian cause rested. Concerned for his young nephew's life, Jasper Tudor took Henry to Brittany for safety. Lady Margaret remained in England and remarried, living quietly while advancing the Lancastrian (and her son's) cause. Capitalizing on the growing unpopularity of Richard III (King of England from 1483), she was able to forge an alliance with discontented Yorkists in support of her son. Two years after Richard III was crowned, Henry and Jasper sailed from the mouth of the Seine to the Milford Haven Waterway and defeated Richard III at the Battle of Bosworth Field (22 August 1485). Upon this victory, Henry Tudor proclaimed himself King Henry VII.