The 719 AD a Fulin embassy ostensibly came from Leo III the Isaurian (r. 717–741 AD) to the court of Emperor Xuanzong of Tang (r. 712–756 AD), during a time when the Byzantine emperor was again reaching out to Eastern powers with a renewed Khazar marriage alliance. It also came as Leo III had just defeated the Arabs in 717 CE. The Chinese annals record that "In the first month of the seventh year of the period Kaiyuan [719 CE] their lord [拂菻王, "the King of Fulin"] sent the Ta-shou-ling [an officer of high rank] of T'u-huo-lo [吐火羅, Tokhara] (...) to offer lions and ling-yang [antelopes], two of each. A few months after, he further sent Ta-te-seng ["priests of great virtue"] to our court with tribute." During its long voyage, this embassy probably visited the Turk Shahis king of Afghanistan, since the son of the king took the title "Fromo Kesaro" when he acceded to the throne in 739 CE. "Fromo Kesaro" is a phonetic transcription of "Roman Caesar", probably chosen in honor of "Caesar", the title of Leo III, who had defeated their common enemy the Arabs. In Chinese sources "Fromo Kesaro" was aptly transcribed "Fulin Jisuo" (拂菻罽娑), "Fulin" (拂菻) being the standard Tang Dynasty name for "Byzantine Empire". The year of this embassy coincided with Xuanzong's refusal to provide aid to the Sogdians of Bukhara and Samarkand against the Arab invasion force. An embassy from the Umayyad Caliphate was received by the Tang court in 732 AD. However, the Arab victory at the 751 AD Battle of Talas and the An Lushan Rebellion crippled Tang Chinese interventionist efforts in Central Asia.