Korean People's Navy
During the Korean War, No applied to join the Korean People's Navy and was accepted after he lied in the selection test. At the naval academy, No won the favor of his history professor who later helped No in the pilot selection test. After passing the selection test, No was promoted to ensign, and brought to Manchuria for flight training. He subsequently received promotion to the rank of lieutenant and then to senior lieutenant. He flew more than 100 combat missions during the war.