Upon securing his realm, the Roman Caesar immediately took up the reed pen to draft an imperial epistle, saturating its opening with exalted praises unto Khosrow Parviz. He declared that after holding solemn counsel with his purest mobads and wise advisors, they had carefully pondered the turns of fate and unlocked the archives of ancient history. Though he had gathered an immense coalition of forces in Constantinople to aid Khosrow, the deliberation was intended to address the root of ancient animosities. The elders of Rome still carried bitter memories of the devastating campaigns of Shapur son of Ardashir, the harshness of Hormizd and Kay Qobad, and the monumental invasions of Nushirvan, which had laid waste to thirty-nine Roman cities and left fields drenched in the blood of nobles.
Yet, Caesar emphasized that the Christian faith forbids returning evil for evil, holding absolute truth and righteousness as the highest virtues. Through soft diplomacy and the healing balm of reason, he had cleansed the hearts of his aggrieved subjects, binding them to set aside the dark memories of past eras. He urged Khosrow to enter into a solemn and binding covenant: that Iran would demand no tribute, respect the Roman borders, and forever renounce the ancient bloody feuds originating from the sons of Fereydun—Iraj, Salm, and Tur.
To solidify this eternal peace, Caesar offered his own daughter—a maiden renowned for her intellect and piety—in noble marriage to Khosrow. Through this imperial union, any offspring born of Caesar's lineage would possess no cause to remember the ancient vendettas of Iraj, thereby bringing lasting tranquility to the world. Evoking the cautionary tale of King Peroz and the Hephthalite ruler Khushnavaz, alongside the holy teachings of Jesus Christ—that wisdom withers when justice is abandoned—the Caesar urged Khosrow to remain true to his oaths, act with righteousness, and shun deceit. The letter was then sealed with musk and the royal signet, and delivered with great honor to Khosrow's envoy.