Protectorate General to Pacify the East

In the place of Baekje and Goguryeo, the Tang dynasty created the Protectorate General to Pacify the East and the Ungjin Commandery.

A proposal to set up the Great Commandery of Gyerim by the Emperor Gaozong of Tang to King Munmu of Silla was refused.

In response the Tang forcibly deported tens of thousands of households and resettled them in empty areas south of the Changjiang (Yangtze) and Huai River, each in contemporary China.

[6] Originally Emperor Taizong of Tang promised to exchange Baekje and the lands south of Pyongyang in return for Silla's military cooperation.

Gaozong accepted Munmu's apologies and withdrew Tang troops to deal with the Tibetan threat in the west.

[11][3][12] The deposed Bojang of Goguryeo was designated "Liaodong Commander King of Joseon" (Korean: 요동주도독 조선왕; Hanja: 遼東州都督朝鮮王) in 667.

[13] In 743, the seat was moved to the Old City of Liaoxi, possibly Ying Prefecture (modern Chaoyang, Liaoning).