Battle of Baekgang
After his father was overthrown by an alliance of Silla and the Chinese Tang Dynasty in 660, Buyeo Yung was sent into exile at the Tang capital Luoyang, along with his father. After the defeat of the Baekje restoration movement led by Boksin and Dochim at the Battle of Baekgang, which had sought to place Yung's brother Buyeo Pung on the throne, Tang felt the need for a ruler who could pacify the Baekje area. Beginning in 664, Buyeo Yung served briefly as the governor of the Ungjin Commandery (Hangul:웅진도독부 Hanja:熊津都督府) which Tang established to oversee the former territory of Baekje.