Battle of Wakefield castle on 30 December. His reasons for doing so have been variously ascribed to deception by the Lancastrian armies, or treachery by some nobles and Lancastrian officers who York thought were his allies, or simple rashness or miscalculation by York. The Duke of York was killed and his army was destroyed, many of the prominent Yorkist leaders and their family members died in the battle or were captured and executed. King Henry VI ascended the throne in 1422, when he was only nine months old. He grew up to be an ineffective king, and prone to spells of mental illness.
Rise of the Ottoman Empire the interregnum. When Mehmed died in 1421, one of his sons, Murad, became sultan. Murad II spent his early years on the throne disposing of rivals and rebellions, most notably the revolts of the Serbs. He also had problems at home. He subdued the rebels of his uncle Mustafa Çelebi and brother Küçük Mustafa. In 1422, Murad II laid siege to Constantinople for several months and lifted it only after forcing the Byzantine emperor, Manuel II Palaiologos to pay additional tribute. In 1422 the first regular war against Venice began with the Siege of Thessalonica (1422–30). Byzantine involvement in the