<prompt> Bhala okuqhubekayo kwalesi sigaba - Ngalesi sikhathi i - United States yahileleka eMpini yaseVietnam njengengxenye yeMpi Yomshoshaphansi yomhlaba wonke. Le mpi kamuva yayiyobonakala ihlukanisa kakhulu umphakathi waseMelika, futhi amabutho aseMelika ahoxiswa e-Indochina ngo-1975 lapho iKhmer Rouge ithumba iPhnom Penh ngo-Ephreli 17, i-Vietnam Peoples Army ithumba  <response>: kaSaigon ngo-April 30 nokuthunjwa kweVientiane yiPathet Lao ngo-December 2. 