 Throughout the 6th century, the Tayy continued their relations with the Sassanids and their chief Arab clients, the Lakhmids of Mesopotamia.Towards the end of the 6th century, a Tayyid chief named Hassan assisted the Sassanid king Khosrow II when the latter fled from his usurper, Bahram Chobin, by giving Khosrow a horse.A few years later, the Lakhmid governor of al-Hirah, al-Nu'man III fell out with Khosrow II, who had been restored to the Sassanid throne, and sought safety with the Tayy.