How a Seventh-Century Alliance Reshaped the Korean Peninsula Through the Paekche–Tang War
Between 660 and 663, the Paekche–Tang War fundamentally altered East Asian power dynamics. Triggered by relentless border raids against Silla, the conflict drew in the Tang dynasty and Yamato allies. What began as a regional struggle evolved into a decisive clash that saw the collapse of the Paekche kingdom.
The conflict originated from the persistent aggression of Paekche and Goguryeo against the Silla kingdom. Seeking survival, Silla’s King Muyeol forged a critical military alliance with the Tang empire under Emperor Gaozong. By 660, the Tang launched a massive invasion, deploying 130,000 troops led by Admiral Su Dingfang. Simultaneously, a 50,000-strong Silla army, commanded by figures including General Kim Yusin, breached Paekche’s eastern defenses at the Battle of Hwangsanbeol, where they overcame a desperate defense by General Gyebaek’s 5,000 troops.
The fall of the capital, Sabi, on 18 July 660, marked the formal conquest of Paekche. King Uija surrendered at Ungjin, and the Tang took 20,000 troops and 93 officials as prisoners, later annexing the territory and establishing five military administrations. Despite this, a revival movement led by General Gwisil Boksin attempted to restore the kingdom. This resistance relied heavily on support from Yamato Wa, which sent Prince Buyeo Pung and, eventually, 27,000 reinforcements to aid the cause.
The final act occurred in 663 at the Battle of Baekgang. A Tang fleet of 170 ships encircled the rebel stronghold at Churyu, annihilating the combined Paekche and Yamato forces over two days of intense naval engagement. The defeat was absolute; Prince Buyeo Pung fled to Goguryeo, and the rebellion was extinguished by 14 October 663. The war left the Tang in control of the region, a outcome that Silla accepted with significant reluctance, as the alliance had not resulted in the territorial gains they initially envisioned.
Source: Paekche–Tang War
