<prompt> Pedzisa mutsara unotevera: Muna October 1965, United States Air Force USAF 20th Helicopter Squadron yakaumbwa paTan Son Nhut Air Base muSouth Vietnam, yakashongedzerwa pakutanga neCH-3C helicopters. Pakazosvika June 1967 ari UH-1F uye UH-1P vakanga akawedzera kuti chikwata wacho Inventory, uye pakupera kwegore chikwata yose akanga achinja kubva Tan Son Nhut kuna Nakhon Phanom Royal Thai Air Force Base, pamwe CH-3s uchatamisa kuti 21st Helicopter Squadron. Musi wa 1 Nyamavhuvhu 1968, chikwata ichi chakadudzirwazve kuti 20th Special Operations Squadron. 20th SOSs UH-1s vaizivikanwa se Green Hornets, zvichibva paruvara rwavo, kunyanya girini maviri-tone camouflage girini uye tan yakatakurwa, uye radio call-chiratidzo Hornet. Basa guru remaherikoputa aya raiva rokuisa uye kubvisa mapoka okuongorora, kupa chifukidziro pamabasa akadaro, kuitisa hondo yepfungwa, uye mamwe mabasa okutsigira mabasa akavanzika zvikurukuru muLaos neCambodia munguva inonzi  <response>: Hondo Yakavanzika. 