<prompt> Bhala okuqhubekayo kwalesi sigaba - Ngo-April 19, 1975, ngemva kokuba iNyakatho yeVietnam inqobe izingxenye ezimbili kwezintathu zeNingizimu yeVietnam, i-Midway, kanye ne-Coral Sea, i-Hancock, ne-, bathunyelwa emanzini aseNingizimu yeVietnam. Ezinsukwini eziyishumi kamuva, amabutho e - U.S. 7th Fleet enza i - Operation Frequent Wind, ukususwa kweSaigon. Ngenxa yalokhu, i-Midway, eyayikhiphe isigamu somoya womoya wokulwa ojwayelekile womkhumbi e-NS Subic Bay, ePhilippines, yahamba yaya eThailand futhi yathatha izindiza eziyisishiyagalombili ze-U.S. Air Force CH-53 ezivela ku-21st Special Operations Squadron kanye nezindiza ezinophephela emhlane ezimbili ze-HH-53 ezivela ku-40th Aerospace Rescue and Recovery Squadron. Njengoba iSaigon yawa  <response>: ukuze amabutho aseNyakatho yeVietnam, la ma-helicopter athutha amakhulu ezisebenzi zase-U.S. nabantu baseVietnam baya eMidway nakwezinye imikhumbi yase-U.S. oLwandle lwaseNingizimu China. 