당 고종
By the time King Muyeol was able to gain the support of Emperor Gaozong of Tang China to conquer Baekje. King Uija had led Baekje into demise as his parties and dissipation caused neglect for state affairs. In 660, Kim Yushin of Silla set out with fifty-thousand troops to rendezvous with the Tang army (size about: 122,711 to 130,000 men) which was being shipped over the sea. When King Uija heard of this crisis, he had already lost support from his ministers and only managed to rally five thousand men. He quickly appointed General Gyebaek as the commander of the armed forces, and sent him out to face Kim Yu-Shin in battle.