Silla–Tang armies crush the Baekje restoration attempt and force Yamato Japan to withdraw from Korea in the Battle of Baekgang.

Silla was a Korean kingdom that existed between 57 BCE – 935 CE and was located on the southern and central parts of the Korean Peninsula. Silla, along with Paekje and Koguryeo, formed the Three Kingdoms of Korea. Silla had the lowest population of the three, approximately 850,000 people, significantly smaller than those of Paekje and Koguryeo.

The Tang dynasty, or the Tang Empire, was an imperial dynasty of China that ruled from 618 to 907, with an interregnum between 690 and 705. It was preceded by the Sui dynasty and followed by the Five Dynasties and Ten Kingdoms period. Historians generally regard the Tang as a high point in Chinese civilisation, and a golden age of cosmopolitan culture. Tang territory, acquired through the military campaigns of its early rulers, rivalled that of the Han dynasty.

Baekje or Paekche was a Korean kingdom located in southwestern Korea from 18 BCE to 660 CE. It was one of the Three Kingdoms of Korea, together with Goguryeo and Silla. While the three kingdoms were in separate existence, Baekje had the highest population of approximately 3,800,000 people, which was much larger than that of Silla and similar to that of Goguryeo.

The Yamato period is the period of Japanese history when the Imperial court ruled from modern-day Nara Prefecture, then known as Yamato Province.

The Battle of Baekgang or Battle of Baekgang-gu, also known as the Battle of Hakusukinoe in Japan, and as the Battle of Baijiangkou in China, was a battle between Baekje restoration forces and their ally, Yamato Japan, against the allied forces of Silla and Tang China. The battle took place in the Baengma River or Baek River, which is the lower reach of the Geum River in Jeollabuk-do province, Korea. The Silla-Tang forces won a decisive victory, compelling Yamato Japan to withdraw completely from Korean affairs and crushing the Baekje restoration movement.