1428

January–December

• June 3 - Dan II leads an army against the Ottomans at Golubac Fortress, obtaining a treaty that will allow him a semi-peaceful rule in Wallachia, until 1432.
• August 30 - Emperor Go-Hanazono accedes to the throne of Japan.
• October 12 - English forces under Thomas Montacute, 4th Earl of Salisbury, besiege Orléans. Jean de Dunois, the Bastard of Orléans, commands the defenders.
• October 24 - Thomas Montacute, 4th Earl of Salisbury, is mortally wounded in an unsuccessful assault on Orléans. He is succeeded in command by William de la Pole, 4th Earl of Suffolk.

  Date unknown

• Itzcóatl becomes ruler of the Aztecs. He eventually begins the construction of Tenochtitlan.
• The Aztec Triple Alliance forms with the alliance of three Aztec city-states—Tenochtitlán, Texcoco, and Tlacopán—and defeats Azcapotzalco to win control of the Valley of Mexico.
• The Valais witch trials begin.
• A serious fire occurs at Baynard's Castle in London, England.
• Voices tell Joan of Arc that Charles VII of France must be crowned, and the English expelled from France.
• Lam Sơn uprising: Lê Lợi, founder of the Lê Dynasty in Vietnam, liberates Annam, and restores the kingdom as Đại Việt.