Battle of Bosworth Field in the context of "House of Tudor"

Richard III (2 October 1452 – 22 August 1485) was King of England from 26 June 1483 until his death in 1485. He was the last king of the Plantagenet dynasty and its cadet branch the House of York. His defeat and death at the Battle of Bosworth Field marked the end of the Middle Ages in England.

Richard was created Duke of Gloucester in 1461 after the accession to the throne of his older brother Edward IV. This was during the period known as the Wars of the Roses, an era when two branches of the royal family contested the throne; Edward and Richard were Yorkists, and their side of the family faced off against their Lancastrian cousins. In 1472, Richard married Anne Neville, daughter of Richard Neville, 16th Earl of Warwick, and widow of Edward of Lancaster, son of Henry VI, a Lancastrian. He governed northern England during Edward's reign, and played a role in the invasion of Scotland in 1482. When Edward IV died in April 1483, Richard was named Lord Protector of the realm for Edward's eldest son and successor, the 12-year-old Edward V. Before arrangements were complete for Edward V's coronation, scheduled for 22 June 1483, the marriage of his parents was declared bigamous and therefore invalid. Now officially illegitimate, Edward and his siblings were barred from inheriting the throne. On 25 June, an assembly of lords and commoners endorsed a declaration to this effect, and proclaimed Richard as the rightful king. He was crowned on 6 July 1483. Edward and his younger brother Richard of Shrewsbury, Duke of York, called the "Princes in the Tower", disappeared from the Tower of London around August 1483.

Henry VII (28 January 1457 – 21 April 1509), also known as Henry Tudor, was King of England and Lord of Ireland from his seizure of the crown on 22 August 1485 until his death in 1509. He was the first monarch of the House of Tudor.

Henry was the son of Edmund Tudor, 1st Earl of Richmond, and Lady Margaret Beaufort. His mother was a great-granddaughter of John of Gaunt, an English prince who founded the Lancastrian cadet branch of the House of Plantagenet. Henry's father was the half-brother of the Lancastrian king Henry VI. Edmund Tudor died three months before his son was born, and Henry was raised by his uncle Jasper Tudor, a Lancastrian, and William Herbert, a supporter of the Yorkist branch of the House of Plantagenet. During Henry's early years, his uncles and the Lancastrians fought a series of civil wars against the Yorkist claimant, Edward IV. After Edward retook the throne in 1471, Henry spent 14 years in exile in Brittany. He attained the throne when his forces, supported by France and Scotland, defeated Richard III at the Battle of Bosworth Field. He was the last king of England to win his throne on the field of battle, defending it two years later at the Battle of Stoke Field to decisively end the Wars of the Roses (1455–1487). He strengthened his claim by marrying Elizabeth of York, Edward IV's daughter.

Wales in the late Middle Ages spanned the years 1282–1542, beginning with conquest and ending in union. Those years covered the period involving the closure of Welsh medieval royal houses during the late 13th century, and Wales' final ruler of the House of Aberffraw, the Welsh Prince Llywelyn II, also the era of the House of Plantagenet from England, specifically the male line descendants of Geoffrey Plantagenet, Count of Anjou as an ancestor of one of the Angevin kings of England who would go on to form the House of Tudor from England and Wales.

The House of Tudor would go on to create new borders by incorporating Wales into the Kingdom of England by the Laws in Wales Acts 1535–1542, effectively ever since then new shires had been created in place of castles, by changing the geographical borders of the Kingdoms of Wales to create a new definitions for towns and their surrounding lands. Historians referring to the end of the late Middle Ages in Britain often reference the Battle of Bosworth Field involving Henry VII of England, which began a new era in Wales.

The House of York was a cadet branch of the English royal House of Plantagenet that fought with the House of Lancaster, another cadet branch of the House of Plantagenet, for the English crown in the second half of the 15th century. The differences ultimately led to the Wars of the Roses. These wars are so named because both houses had roses in their coats of arms, the Yorks a white one and the Lancasters a red one.

Three of the members of the House of York became kings of England in the late 15th century: Edward IV, Edward V and Richard III. The House of York descended in the male line from Edmund of Langley, 1st Duke of York, the fourth surviving son of Edward III. In time, it also represented Edward III's senior line, when an heir of York married the heiress-descendant of Lionel, Duke of Clarence, Edward III's second surviving son. It is based on these descents that they claimed the English crown. Compared with its rival, the House of Lancaster, it had a superior claim to the throne of England according to cognatic primogeniture, but an inferior claim according to agnatic primogeniture. The reign of this dynasty ended with the death of Richard III of England at the Battle of Bosworth Field in 1485. It became extinct in the male line with the death of Edward Plantagenet, 17th Earl of Warwick, in 1499.

Lady Margaret Beaufort (/ˈboʊfərt/ BOH-fərt or /ˈbjuːfərt/ BEW-fərt; 31 May 1443 – 29 June 1509) was a major figure in the Wars of the Roses of the late 15th century, and mother of Henry VII of England, the first Tudor monarch. She was also a second cousin of Henry VI, Edward IV and Richard III of England.

A descendant of King Edward III, Lady Margaret passed a disputed claim to the English throne to her son, Henry Tudor. Capitalising on the political upheaval of the period, she actively manoeuvred to secure the crown for her son. Margaret's efforts ultimately culminated in Henry's decisive victory over King Richard III at the Battle of Bosworth Field. She was thus instrumental in orchestrating the rise to power of the Tudor dynasty. With her son crowned Henry VII, Margaret wielded a considerable degree of political influence and personal autonomy. She was also a major patron and cultural benefactor during her son's reign, initiating an era of extensive Tudor patronage.