When the Caesar of Rome learned of Khosrow Parviz's urgent quest to reclaim his crown, he assembled a grand army of one hundred thousand renowned Roman warriors. Alongside this formidable host, Caesar bestowed his brilliant and dignified daughter, Princess Maryam, to be Khosrow's bride. She departed adorned with unmatched royal treasures: golden litters, ebony sedans, jewel-encrusted crowns, fine Roman brocades, and a retinue of five hundred wise servants, forty fair maidens, and four venerable Roman philosophers. The valiant Gustahm received the princess and her caravan with great honor. In his letters, Caesar lauded the Iranian envoys—praising Gustahm, Shapur, Baluy, and especially Kharrad Barzin, whom he likened to an incomparable sun of divine wisdom and integrity.
Consulting the astrologers, Caesar chose the auspicious day of Bahram for the departure. He escorted the procession for two days before delivering his final counsel to Maryam, urging her to maintain royal dignity and chastity. Entrusting her and the expedition to his warrior brother, Niyatus, Caesar bade a loving farewell. Upon news of their approach, King Khosrow rode out at the head of his host. He warmly embraced Niyatus, offering profound gratitude for Caesar's generous aid. Khosrow then approached Maryam's covered carriage, respectfully kissed her hand, and rejoiced at her arrival. For three days, Khosrow hosted magnificent feasts for the Roman commanders, including Sargas and Kut. When Niyatus presented seventy elite captains to Khosrow, the Persian king offered heartfelt praise to the Almighty, confident that with Roman alliance and divine favor, he would overcome his foes and restore his throne.