6 events the sources record for this year, grouped by region.
What happened
China (6)
Wang Junchuo defeated the Tibetans west of Qinghai and seized their supplies, horses and sheep. (Old Book of Tang (Jiu Tangshu), Annals 舊唐書 卷8 開元15年 1月)
The Tibetans attacked Guazhou, captured the prefect Tian Yuanxian and Wang Junzhuo's father, and took all the army's grain. (Old Book of Tang (Jiu Tangshu), Annals 舊唐書 卷8 開元15年 9月)
In September 727 (Bingzi day), Tubo generals Xinuoluo Gonglu and Zhulong Mangbuzhi take Guazhou, capture its governor Tian Yuanxian and others, and attack Yumen commandery. (Zizhi Tongjian (Comprehensive Mirror) 권213 727년 항)