The Lancastrian Usurpation and Triumph (1399–1422)
1399 – Henry IV Seizes the Throne: Henry Bolingbroke deposes his unpopular cousin, Richard II, bringing an end to the main Plantagenet line. Henry is crowned as Henry IV, establishing the House of Lancaster.1415 – The Battle of Agincourt: Henry V, who succeeded his father in 1413, invades France during the Hundred Years' War. His famous victory at Agincourt secures temporary English dominance over the French.1420 – Treaty of Troyes: Henry V is named heir to the French throne, marrying Catherine of Valois. This represents the absolute peak of Lancastrian power.
1422 – The Infant King: Henry V dies suddenly, leaving his nine-month-old son, Henry VI, on the throne. Henry VI grows up to be a deeply pious, mentally unstable, and weak ruler.1453 – Loss of France & Mental Breakdown: England loses all French territories except Calais, effectively ending the Hundred Years' War. The shock triggers Henry VI's first major bout of mental illness.1455 – The Wars of the Roses Begin: Seizing on the king's incapacity, Richard, Duke of York, challenges the Lancastrian government. The first major clash occurs at the First Battle of St Albans, igniting decades of civil war between the House of Lancaster (red rose) and the House of York (white rose).
1461 – Edward IV Takes the Crown: After crushing the Lancastrians at the brutal Battle of Towton, Richard of York’s son is crowned Edward IV, establishing the House of York.1471 – Lancastrian Elimination: After a brief deposition and restoration of Henry VI, Edward IV reclaims the throne at the Battles of Barnet and Tewkesbury. Henry VI is murdered in the Tower of London, and his only son is killed in battle, virtually wiping out the Lancastrian line.1483 – The Princes in the Tower: Edward IV dies unexpectedly. His brother, Richard, Duke of Gloucester, intercepts Edward's young sons (the Princes in the Tower), declares them illegitimate, and crowns himself Richard III. The princes vanish, sparking widespread outrage.
1485 – Battle of Bosworth Field: Henry Tudor, an exiled nobleman with a tenuous Lancastrian claim, invades England. He defeats and kills Richard III at Bosworth. Henry is crowned Henry VII, ending Plantagenet rule. He marries Elizabeth of York to symbolically unite the warring factions.1487 – Battle of Stoke Field: The final major armed conflict of the Wars of the Roses takes place. Henry VII defeats a Yorkist rebellion rallying behind the pretender Lambert Simnel. This victory definitively secures the Tudor dynasty, anchoring the crown and setting the stage for the English Renaissance.