Yazdegerd III, born in six hundred twenty-four, ascended to the throne of the Sasanian Empire at the tender age of eight. As the last King of Kings, his reign from six hundred thirty-two to six hundred fifty-one was marked by a lack of authority, as he became a mere figurehead. The real power lay in the hands of army commanders, courtiers, and influential aristocrats, who were embroiled in constant internal strife.
The Sasanian Empire faced significant challenges during Yazdegerd's rule, as these internal conflicts severely weakened the state. This vulnerability opened the door to invasions from the Göktürks in the east and the Khazars in the west. Despite his efforts, Yazdegerd was unable to halt the relentless advance of the Rashidun forces, which ultimately led to the conquest of Iran.
Throughout his reign, Yazdegerd found himself fleeing from one province to another, desperately seeking to muster an army to reclaim his lost power. His attempts were in vain, and he became a symbol of the decline of the once-mighty Sasanian Empire.
Yazdegerd III's life came to a tragic end in six hundred fifty-one, when he was killed by a miller near Merv. His death marked the conclusion of over four hundred years of pre-Islamic Iranian rule, sealing the fate of the Sasanian Empire.