On April 22, 1951, Chinese forces undertook a major offensive against the United Nations forces and pierced through the first line of defence held by the 6th South Korean Division. During the Battle of Kapyong the 2nd Battalion, PPCLI, the 3rd Battalion, Royal Australian Regiment, and A Company, 72nd Heavy Tank Battalion (US) were tasked with the defence of the Kapyong Valley. The formation delayed the Chinese forces for three days while United Nations forces withdrew to a new defensive line, thus saving Seoul. For their action, these three units received the United States Presidential Unit Citation and the Republic of Korea Presidential Unit Citation.