The 1400s
477 sourced entries across 10 years, inside the 15th century. Each year below opens its own page; the lines under it are that year’s highest-ranked entries.
1400 CE61 entries
- April – King Swa Saw Ke, of Ava, the largest kingdom in Burma, dies after a reign of 33 years and is succeeded by his son, King Tarabya, who reigns less than seven months before being assassinated.
- October 29 – Jingnan campaign: In China, Prince Zhu Di of Yan expands his conquests with the capture of Cangzhou in Heibei province.
- December 21 – Manuel II Palaiologos becomes the only Byzantine Emperor ever to visit England, and is greeted at Blackheath by King Henry IV, who hosts the Emperor at Eltham Palace during the Christmas holiday.
1401 CE54 entries
- May 6 – The council of the Republic of Venice passes a law prohibiting the Republic's executive, the Doge, from using the state owned official ship, the bucentaur, from being used for private purposes.
- June – The English Pale in Ireland is reduced to Dublin, County Kildare, County Louth, and County Meath.
- November 2 – The Battle of Tuthill takes place at Caernarfon in Wales as Owain Glyndŵr loses 300 soldiers in an attack by the English Army.
1402 CE55 entries
- March 26 – David Stewart, Duke of Rothesay, heir to the throne of Scotland, dies while being held captive by his uncle, Robert Stewart, 1st Duke of Albany.
- April 3 – King Henry IV of England is married by proxy to Joan of Navarre in a ceremony at the Eltham Palace near London.
- December 26 – (3rd waxing of Tabodwe 764 ME) Ava–Hanthawaddy War: In what is now Myanmar, the forces of the Ava Kingdom, led by King Minkhaung I defeat King Razadarit of the Kingdom of Hanthawaddy in the Battle of Nawin, forcing Razadarit to abandon the siege of Prome.
1403 CE57 entries
- March 13 – Muhammad Sultan Mirza, the favorite grandson and heir to the throne of the Emperor Tamerlane, Emperor of Transoxiana (comprising modern Afghanistan and parts of Iran, Tadzikstan and Kazakhstan), dies from injuries sustained in the Battle of Ankara.
- April – Balša III succeeds his father Đurađ II as ruler of the Principality of Zeta (now Montenegro).
- September 4 – The first 200 Chinese treasure ships are ordered by the new Ming dynasty Emperor Cheng Zu from the Capital Guards at Nanjing.
1404 CE44 entries
- April 12 – Centurione II Zaccaria buys the Principality of Achaea, located on the Peloponnese peninsula in modern-day Greece, from King Ladislaus of Naples.
- April 27 – At Dijon, in France's Burgundian State, John the Fearless (Jean sans Peur), nephew of Charles VI of France, becomes the new Duke of Burgundy upon the death of his father, Philip the Bold.
- June 14 – Welsh rebel leader Owain Glyndŵr enters an alliance with the French against the English. He has begun to hold parliamentary assemblies (first on May 10 at Dolgellau).
1405 CE38 entries
- July 11 – Ming Dynasty fleet commander Zheng He sets sail from Suzhou, to explore the world for the first time.
- October 5 – Christine de Pizan writes a letter to Queen Isabeau, urging her to intervene in the political struggle between the dukes of Burgundy and Orléans.
- November 17 – The Sultanate of Sulu is established on the Sulu Archipelago, off the coast of Mindanao in the Philippines.
1406 CE46 entries
- January 22 – Abū al-Faḍl Al-Musta'in becomes the new Abbasid caliph of Cairo, spiritual leader of the Muslim faith in the Mamluk Sultanate of Egypt, succeeding his father, Al-Mutawakkil I.
- June 4 – The Chinese merchant Chen Yanxiang and his crew of 121 people depart from Java to Korea on the pretext of being Java's ambassador to Korea. His djong ship carries with it with various Southeast Asian products, including parrots, peacocks, agarwood, camphor, and black pepper.
- October 26 – Erik of Pomerania, ruler of the Kalmar Union, marries Philippa, daughter of Henry IV of England, in Lund Cathedral.
1407 CE37 entries
- January 20 – Ming–Việt War: China conquers Dong Do, the eastern capital of Dai Ngu (now Hanoi, capital of Vietnam, and follows six days later by conquering the western capital, Tay Do (now Thanh Hóa) on January 26.
- April 23 – The Banco di San Giorgio is founded by the government of the Republic of Genoa in Italy.
- June 16 – Ming–Hồ War: Ho Han Thuong, Emperor of Vietnam (Dai Ngu) is captured by the Imperial Chinese Army along with his father, the former Emperor Hồ Quý Ly, completing the conquest of Vietnam by the Chinese Empire.