252-256 - Shapur I moves forward to the Eastern Roman Provinces.
c. 259 - Defeat and capture of
Valerian by Shapur I.
c. 260 - 2nd foray of the Eastern Roman Provinces by Shapur I.
c. 261 -
Odaenathus, the ruler of
Palmyra, stops the triumphant Persian troops coming back home following the looting of
Antioch, scores a notable conquest against Shapur I and drives the Persians back across the
Euphrates.
399 - Coronation of
Yazdegerd I, titled “the Sinner” owing to his efforts to control the influence of Zoroastrian clergy and his leniency towards other believes.
409 - Christian are allowed to publicly worship and to construct churches.[1]
590 - Hormizd IV is assassinated; Coronation of
Khosrow II.
590 - Uprising of
Bahrām Chobin and his seizure of the Persian throne.
591 - Overwhelming of Bahrām Chobin; he escapes to the Turks in
Central Asia but is killed after a year.
Khosrow II regains the throne with the help of the Byzantine
Emperor Maurice.
628-635 - Weakening of the Sasanian dynasty due to a succession of ineffectual kings and queens including the queens
Boran and
Azarmidokht; chaotic situation prevails.