Ascending to the throne as an infant in 1422, Henry VI became the youngest monarch in English history. His long and tumultuous reign was defined by the gradual erosion of English territories in France, which had been secured by his father, Henry V. As the king matured, his perceived indecisiveness and reliance on unpopular favourites exacerbated political instability, ultimately leading to the loss of almost all English holdings on the continent by the mid-fifteenth century.

The domestic situation deteriorated as factional rivalries intensified among the nobility, creating a power vacuum that Henry struggled to control. This instability provided the catalyst for the Wars of the Roses, a protracted series of dynastic conflicts between the houses of Lancaster and York. Henry’s inability to maintain order or effectively manage his court left the monarchy increasingly vulnerable to challenges from his rivals.

Throughout his life, Henry VI was caught in a cycle of deposition and restoration that mirrored the volatility of the era. His reign was marked by several key developments:

• The loss of English lands in France, effectively ending the Hundred Years' War.
• The rise of intense factionalism within the royal court and among the nobility.
• The outbreak of the Wars of the Roses, which destabilised the Lancastrian line.
• Multiple periods of deposition and brief restoration to the throne.
• His eventual death in 1471, coinciding with the collapse of the Lancastrian cause.

Henry VI remains a complex figure in British history, often remembered for his piety and his role as a patron of education, most notably through the founding of Eton College and King's College, Cambridge. Despite these cultural contributions, his political legacy is dominated by the collapse of central authority and the tragic decline of his dynasty. By the time of his death in 1471, the Lancastrian cause had been largely extinguished, leaving a fractured kingdom in the wake of his turbulent rule.