満州国軍
Due to his excellent grades in school, Chung won a place at the Manchukuo Imperial Army academy in Mukden, from which he graduated in September 1937. Again, his performance was regarded as excellent, and he was sent on to attend the 55th class of the Imperial Japanese Army Academy in Tokyo, where he specialized in cavalry operations. He also assumed the Japanese name Nakajima Ikken (中島一權). During the Pacific War, he served in the Manchukuo Imperial Army as a military police captain. Following the Soviet invasion of Manchuria at the end of World War II, he was briefly captured by Soviet forces and interrogated by the KGB.