 At one point during the night of April 22–23, 1951, the Princess Patricia's had to call down artillery fire on their own positions to stop the advancing Chinese.The successful defence of the Kapyong valley earned the "Princess Pats" a presidential citation from President Truman, the first time that a Canadian unit had been so honored.The rest of 25th Infantry Brigade arrived in South Korea on 25 May 1951, and joined the Commonwealth Division in the summer.