After suffering a minor defeat in battle against the Eastern Roman empire and Khosrau II's humiliation which followed the defeat, he along with the main Persian army (spah) rebelled against Khosrau II and marched toward Ctesiphon.
After suffering a minor defeat in battle against the Eastern Roman empire, Shah Hormizd IV humiliated him, sending him women's clothing to wear. Thus, he along with the main Persian army (spah), rebelled against the Shah and marched toward Ctesiphon.