Henry was the only child of King Henry V of England and was his heir. He was born on 6 December 1421 at Windsor. He became king at the age of nine months on 31 August 1422, when his father died. His mother, Catherine of Valois, was then only twenty years old. Because she was the daughter of King Charles VI of France, and France had been the enemy of England, the English people did not trust her and she was not allowed to have a large part in raising her son.