In the fifth year of the reign of Emperor Gaozong of Tang (660 AD), Su Dingfang, the grand marshal of the Tang army, led his troops across the sea to destroy Baekje, capturing King Uija of Baekje alive. A Tang commandery was established on the former Baekje territory, creating a pincer movement against Goguryeo. After the Sui Emperor Yangdi's campaigns against Goguryeo starting in 605 AD, lasting over half a century, the war finally saw the dawn of victory. However, just as Su Dingfang presented the Baekje royal family as captives in Chang'an, Baekje erupted in rebellion. Prince Buyeo Fongyang, who had been held hostage in Wa (Japan), returned with the monk Daocen, launching a restoration movement. Wa also took the opportunity to send troops to the peninsula, attempting to reclaim the "Imna Four Counties." Meanwhile, the newly appointed commander of the Bearjin Commandery, General Wang Wendu, died suddenly of illness upon arrival. The allied forces...