<prompt> Bhala okuqhubekayo kwalesi sigaba - Kodwa ekugcineni, njengoba amabutho aseNingizimu Vietnam ayebhidlika, kwakuyi-T-54 tank yebutho laseNyakatho Vietnamese eyangena esangweni elikhulu  <response>: kaMongameli ngo-10:45 ngo-April 30, 1975, okwaqeda iMpi YaseVietnam. 