Gao Xianzhi

Gao Xianzhi or Ko Sŏnji (died January 24, 756) was a Tang dynasty general of Goguryeo descent. He was known as a great commander during his lifetime. He is best known for taking part in a number of military expeditions to conquer the Western Regions, over the Pamir Mountains and reaching as far as the Talas River. In 751 he commanded the Tang forces during the Battle of Talas, fighting against the Abbasid Caliphate. The Tang defeat at the Talas River is considered to mark the end of both Tang western expansion and Abbasid eastern expansion.

Around the beginning of the year 756, Gao and fellow general Feng Changqing offended the powerful eunuch Bian Lingcheng (邊令誠) while defending the Tong Pass against the rebel An Lushan, who had rebelled in 755. Bian then accused Feng of cowardice and Gao of corruption, and both were executed.