Taedong River
Afterwards in 676, the Tang government moved the Protectorate General to Pacify the East to Liaodong. Although the Tang forces lost the conquered territories south of Taedong River, Silla could not regain the former Goguryeo territories to the north of Taedong River, which had fallen into Tang dominion. The Tang empire had taken control of Liaodong Peninsula, while Silla controlled the Korean Peninsula. Relations between Tang and Silla ceased until the early 8th century, when King Seongdeok of Silla (702–737) and Emperor Xuanzong of Tang (712–755) reestablished diplomatic ties and initiated a reconciliation between the states.