The first decade of the 1400s was a period of intense political upheaval and shifting connections across Eurasia. Local rebellions, dynastic contests and ambitious state projects reshaped power in several regions, while seeds of broader intellectual and maritime change were being planted. This article outlines the principal trends, notable events and longer-term significance of 1400–1409.

Major political and military developments

Several dramatic conflicts altered regional balances of power. In 1400 Owain Glyndŵr led a major Welsh uprising against English rule, which evolved into a prolonged struggle over Welsh autonomy. In 1402 the Central Asian conqueror Timur (Tamerlane) defeated the Ottoman sultan Bayezid I at the Battle of Ankara, an event that precipitated an Ottoman civil war known as the Interregnum. The Timurid sphere reached its height in the early 1400s but Timur died in 1405, producing further political fragmentation in Central Asia.

Ming China and the beginning of state-sponsored maritime expansion

In China, the Yongle Emperor consolidated power after seizing the throne in the early 1400s. Under his rule the Ming court launched large-scale expeditions designed to extend diplomatic and commercial reach; the famous treasure voyages led by Admiral Zheng He began in 1405 and reflected a temporary but spectacular projection of Chinese naval power into the Indian Ocean.

European institutions, the papacy and higher learning

Europe saw institutional turbulence as well. The Western Schism in the Catholic Church was aggravated by the Council of Pisa in 1409, which attempted a resolution but briefly created a third papal claimant. Intellectual life continued to evolve: new and reorganized universities emerged—most notably the foundation of the University of Leipzig in 1409—and artistic and literary currents associated with the early Renaissance were developing in Italian city-states.

Notable events (selection)

  • 1400: Deaths and cultural shifts in England; the revolt of Owain Glyndŵr begins in Wales.
  • 1402: Battle of Ankara — Timur defeats and captures Bayezid I, triggering the Ottoman Interregnum.
  • 1405: Death of Timur; Ming China launches major maritime expeditions under imperial patronage.
  • 1409: Council of Pisa attempts to resolve the papal schism; University of Leipzig established.

The decade was not a period of simple continuity but one of transitions. Centralized monarchies, expansive tribute empires and regional warlords all adjusted to new pressures. Maritime commerce and state-supported voyages foreshadowed a later century of wider oceanic exchange. In Europe and Asia alike, the events of 1400–1409 set the stage for further political consolidation, cultural exchanges and the complex transformations that defined the early 15th century.