Directory

651 CE

A year defined by the death of the last Sassanid king Yazdegerd III and the final collapse of the Sassanid Empire, ending over four centuries of Persian imperial rule.

Geopolitics & Diplomacy

  • Yazdegerd III, the last Sassanid emperor, was killed near Merv in Central Asia, reportedly murdered by a local miller, ending the Sassanid dynasty that had ruled Persia since 224 CE.
  • The death of Yazdegerd III marked the final end of the Sassanid Empire, one of the great powers of late antiquity, and completed the Arab Muslim conquest of the Iranian plateau.
  • The former Sassanid territories were incorporated into the Rashidun Caliphate, bringing Zoroastrian Persia under Islamic rule and beginning the gradual conversion of its population.

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.