Tang–Nanzhao Border Wars

Timeline

1. 829Chengdu · SichuanTaking advantage of internal turmoil in the Tang's Xichuan, Nanzhao's king Cuo'e sent troops to capture prefectures and counties around Chengdu, carrying off tens of thousands of artisans and commoners, shaking Jiannan.
2. 830–831Xichuan · SichuanThe Tang appointed Li Deyu as military commissioner of Xichuan, who reorganized defenses and built fortifications, fighting a war of attrition with Nanzhao forces along the border and gradually recovering some lost territory.
3. 832–833Dali · YunnanNanzhao continued to raid Qianzhong and the Xichuan border from time to time; though the Tang court used both envoys and warfare, the pressure on the southwestern frontier remained unresolved, becoming a heavy fiscal and military burden in the late Tang.