 The Tayy are mentioned in the late 5th century as having raided numerous villages in the plains and mountains of the Syrian Desert, including parts of Byzantine territory.This prompted the Byzantine army to mobilize its Arab clients at the desert frontiers with Sassanid-held Mesopotamia to confront the Tayy.The Byzantines demanded restitution from the Tayy, but the Sassanid general Qardag Nakoragan instead opened negotiations that called for the Byzantines' Arab clients to restore livestock and captives taken from Sassanid territory in previous years in return for compensation from the Tayy.