and in 1941 attacked Pearl Harbor, signalling the start of the Pacific War with the U.S. declaring war against Japan. Chung-Ang Teacher Training School was heavily targeted in view of the fact that Yim was educated in U.S. and a devout Christian. The Communications Unit of the Japanese Army attempted to take possession of the school, but their efforts were blocked by the strong resistance of Yim. By the end of WW2, under pressure from the Japanese forces, the school was no longer able to admit new students, and the school was closed in 1944. Construction and development of a comprehensive university 1946–1955 As Japan was defeated and Korea liberated, Dr. Yim reopened the doors to Chung-Ang Teacher Training School on 28 September 1945, and established the school motto, "Live in Truth, Live for Justice". On 1 October of the same year, Chung-Ang Teacher Training School was re-organised under the name of Chung-Ang Professional School for Women and followed by the Admissions Ceremony. The Foundation, Chung-Ang Culture Institute, was established in November 1946, and its legal registration was completed by the following year. In April 1947, the school was again reorganised into Chung-Ang College for Women, and then to Chung-Ang College in May 1948, establishing itself as a co-educational institution. Whilst Dr. Yim served as a national diplomat in the United Nations, obtaining their endorsement to build a new Korea, she also continued her efforts in developing the school and was appointed dean and chairman of the board. Although the college celebrated its first conferment of a bachelor's degree in May 1950, it was again indefinitely closed due to the outbreak of the June 25 Korean War. Students were re-admitted subsequent to the September 28 reclaim of the Country, but soon the school had to flee to Busan and set up a temporary office there in the event of January 4 Retreat of Korea's allied forces. Upon Dr. Yim's return to the country in April 1951 after completing her diplomatic duties in U.S., the school started to give lectures in Song-do, Busan. Later, it installed branch campuses and lectures in Iri and Seoul. Chung-Ang College continued to provide education during the war times. As a result, the second, third and fourth bachelor's degree Conferment were held during the war years in Busan, in 1951, 1952 and 1953. The school continued to provide education during the evacuation to Busan and was