금강
In 663, Baekje restoration forces and the Yamato navy convened in southern Baekje with the intent to relieve the capital of the Baekje restoration movement in Churyu, which was under siege by Silla forces. The Yamato navy was to ferry ground troops to Churyu via the Geum River and lift the siege. However, Tang also sent 7,000 soldiers and 170 ships to blockade Yamato reinforcements from relieving the capital.