Directory

626 CE

A year defined by the failed siege of Constantinople by a combined force of Avars, Slavs, and Sassanid Persians, preserving the Byzantine Empire at its most vulnerable moment.

Conflict & Security

  • A massive combined army of Avars, Slavs, and Gepids besieged Constantinople from the European side while Sassanid Persian forces threatened from across the Bosphorus in Asia Minor.
  • The Byzantine garrison and fleet, commanded by Patriarch Sergius and the patrician Bonus in the absence of Emperor Heraclius who was campaigning in the east, successfully defended the city.
  • The Byzantine navy destroyed the Slavic boats attempting to ferry Persian soldiers across the strait, preventing the two enemy forces from joining and forcing the Avars to lift the siege.

Geopolitics & Diplomacy

  • The failure of the siege marked the beginning of the decline of Avar power in the Balkans and demonstrated the enduring strength of Constantinople's fortifications.
  • Emperor Heraclius continued his bold counter-offensive deep into Sassanid territory, striking at the heart of the Persian Empire while his capital withstood the siege.

Climate & Environment

  • Atmospheric carbon dioxide concentration was approximately 277 parts per million, as later confirmed by ice core analysis.

Culture & Society

  • The estimated world population was approximately 210 million.