Richard III in the context of "George, Duke of Clarence"

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.

The House of Plantagenet (/plænˈtædʒɪnɪt/ plan-TAJ-in-it) was a royal house which originated in the French county of Anjou. The name Plantagenet is used by modern historians to identify four distinct royal houses: the Angevins, who were also counts of Anjou; the main line of the Plantagenets following the loss of Anjou; and the Houses of Lancaster and York, two of the Plantagenets' cadet branches. The family held the English throne from 1154, with the accession of Henry II, until 1485, when Richard III died in battle.

England was transformed under the Plantagenets, although only partly intentionally. The Plantagenet kings were often forced to negotiate compromises such as Magna Carta, which constrained royal power in return for financial and military support. The king was no longer just the most powerful man in the nation, holding the prerogative of judgement, feudal tribute and warfare, but had defined duties to the realm, underpinned by a sophisticated justice system. By the end of the reign of Edward III, the Plantagenets developed a new identity including adopting the language of the ordinary people—Middle English—as the language of governance. This is one of the reasons that the Oxford Dictionary of National Biography considers Edward III as culturally the first English Plantagenet ruler.

Richard of York, 3rd Duke of York (21 September 1411 – 30 December 1460), also named Richard Plantagenet, was a leading English magnate and claimant to the throne during the Wars of the Roses. He was a member of the ruling House of Plantagenet by virtue of being a direct male-line descendant of Edmund of Langley, King Edward III's fourth surviving son. However, it was through his mother, Anne Mortimer, a descendant of Edward III's second surviving son, Lionel of Antwerp, that Richard inherited his strongest claim to the throne, as the opposing House of Lancaster was descended from John of Gaunt, Duke of Lancaster, the third surviving son of Edward III. He also inherited vast estates and served in various offices of state in Ireland, France and England, a country he ultimately governed as Lord Protector due to the mental instability of King Henry VI.

Richard's conflicts with Henry's wife, Margaret of Anjou, and other members of Henry's court, such as Edmund Beaufort, 2nd Duke of Somerset, and his competing claim to the throne, were leading factors in the political upheaval of mid-fifteenth-century England, and a major cause of the Wars of the Roses (1455–1487). Richard eventually attempted to take the throne, but was dissuaded, although it was agreed that he would become king on Henry's death. However, within weeks of securing this agreement (the Act of Accord), he was killed at the Battle of Wakefield in 1460, alongside his son, Edmund. Two of his surviving sons later ascended the throne: Edward IV and Richard III.

The Battle of Bosworth or Bosworth Field (/ˈbɒzwərθ/ BOZ-wərth) was the last significant battle of the Wars of the Roses, the civil war between the houses of Lancaster and York that extended across England and Wales in the latter half of the 15th century. Fought on 22 August 1485, the battle was won by an alliance of Lancastrians and disaffected Yorkists. Their leader Henry Tudor, Earl of Richmond, became the first Welsh monarch of England from the Tudor dynasty by his victory and subsequent marriage to the de facto Yorkist heiress, Elizabeth of York. His opponent Richard III, the last king of the House of York, was killed during the battle, the last English monarch to fall in battle. Historians consider Bosworth Field to mark the end of the Plantagenet dynasty, making it one of the defining moments of English history.

Richard's reign began in 1483 when he ascended the throne after his twelve-year-old nephew, Edward V, was declared illegitimate, likely at Richard’s instigation. The boy and his younger brother Richard soon disappeared, and their fate remains a mystery. Across the English Channel Henry Tudor, a descendant of the greatly diminished House of Lancaster, seized on Richard's difficulties and laid claim to the throne. Henry's first attempt to invade England in 1483 foundered in a storm, but his second arrived unopposed on 7 August 1485 on the south-west coast of Wales. Marching inland, Henry gathered support as he made for London. Richard hurriedly mustered his troops and intercepted Henry's army near Ambion Hill, south of the town of Market Bosworth in Leicestershire. Lord Stanley and Sir William Stanley also brought a force to the battlefield, but held back while they decided which side it would be most advantageous to support, initially lending only four knights to Henry's cause; these were: Sir Robert Tunstall, Sir John Savage (nephew of Lord Stanley), Sir Hugh Persall and Sir Humphrey Stanley. Sir John Savage was placed in command of the left flank of Henry's army.

Edward V (2 November 1470 – presumably July 1483) was King of England from 9 April to 25 June 1483. He succeeded his father, Edward IV, upon the latter's death. Edward V was never crowned, and his brief reign was dominated by the influence of his uncle and Lord Protector, the Duke of Gloucester, who deposed him to reign as King Richard III; this was confirmed by the Titulus Regius, an Act of Parliament which denounced any further claims through Edward IV's heirs by delegitimising Edward V and all of his siblings. This was later repealed by Henry VII, who subsequently married Elizabeth of York, Edward V's eldest sister.

Edward V and his younger brother, Richard of Shrewsbury, are known as the Princes in the Tower. They disappeared after being sent to heavily guarded royal lodgings in the Tower of London. Responsibility for their disappearance (and presumed deaths) is widely attributed to Richard III, who sent them to the Tower, but the lack of conclusive evidence and conflicting contemporary accounts allow for other possibilities.

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.