Analysis of information sources in references of the Wikipedia article "Tang dynasty" in English language version.
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{{citation}}: ISBN / Date incompatibility (help){{citation}}: ISBN / Date incompatibility (help){{citation}}: ISBN / Date incompatibility (help){{citation}}: ISBN / Date incompatibility (help){{citation}}: ISBN / Date incompatibility (help)Subsequent Umayyad weakness together with the expansive foreign policy of Emperor Xuanzong (r. 712–756) allowed for a return of Tang power in central Asia, but that ended abruptly in 751 when a Tang army under the Korean general Gao Xianzhi 高仙芝 was defeated at the Battle of Talas (near modern Tashkent) by an Arab army of the newly established Abbasid caliphate (750–1258).