The Volunteer Army Division is preparing to launch a new round of offensive against the enemy, and wants to push the front across the Sanchuan River to the Yujiang River. The premise of this battle is to blow up the Yujiang Bridge, the only channel for the US troops to retreat on the front line.The division commander assigned this task to Liang Chen and contacted Zhang Zhenghuan, the liaison officer of the Korean People's Army, for assistance.The South Korean Army planned to completely eliminate the North Korean guerrillas entrenched in the Sancheon River and Ok River areas. Baek Chang-ho led a team disguised as the North Korean Communist Army and civilians towards the area where the North Korean guerrillas were active.They disguised themselves as the North Korean army, tore off their disguises in the village, massacred the villagers, and warned that they were not allowed to provide food or any form of help to the North Korean army.