567, Diza-bul, the Turkish Khan, sent ambassadors to Chosroes with proposals for the establishment of free commercial intercourse between the Turks and Persians, and even for the conclusion of a treaty of friendship and alliance between the two nations.

Chosroes suspected the motive for the overture, but was afraid openly to reject it.

He desired to discourage intercourse between his own nation and the Turks, but could devise no better mode of effecting his purpose than by burning the Turkish merchandise offered to him after he had bought it, and by poisoning the ambassadors and giving out that they had fallen victims to the climate.
His conduct exasperated the Turkish Khan, and created a deep and bitter hostility between the Turks and Persians.

It was at once resolved to send an embassy to Constantinople and offer to the Greek emperor the friendship which Chosroes had scorned.

The embassy reached the Byzantine court early in A.D.568, and was graciously received by Justin, the nephew of Justinian, who had succeeded his uncle on the imperial throne between three and four years previously.