Bahram, however, ignored his warning—a few days later, he reached the Nahrawan Canal near Ctesiphon, where he fought Khosrow's men, who were heavily outnumbered, but managed to hold Bahram's men back in several clashes. However, Khosrow's men eventually began losing their morale, and were in the end defeated by Bahram's forces. Khosrow, together with his two uncles, his wives, and a retinue of 30 nobles, thereafter fled to Byzantine territory, while Ctesiphon fell to Bahram. Bahram declared himself king of kings in the summer of 590, asserting that the first Sasanian king Ardashir I () had usurped the throne of the Arsacids, and that he now was restoring their rule.