Buuxi weedhan soo socota: Bishii Oktoobar 1965, Ciidamada Cirka ee Mareykanka (USAF) 20aad Helicopter Squadron waxaa laga sameeyay saldhigga Tan Son Nhut Air ee Koonfurta Vietnam, oo markii hore lagu qalabeeyay diyaaradaha qumaatiga u kaca ee CH-3C. Bishii Juun 1967 UH-1F iyo UH-1P ayaa sidoo kale lagu daray kaydka cutubka, dhammaadkii sanadka ayaa cutubka oo dhan laga soo wareejiyay Tan Son Nhut ilaa Nakhon Phanom Royal Thai Air Force Base, iyadoo CH-3s loo wareejiyay 21aad Helicopter Squadron. 1-dii Agoosto 1968, cutubka waxaa dib loogu magacaabay 20aad ee Howlgallada Gaarka ah. UH-1s ee 20th SOS waxaa loo yaqaanay "Green Hornets", oo ka soo jeeda midabkooda, waxaa la qaatay laba midab oo cagaaran oo laba midab leh (cagaar iyo bunni), iyo calaamadda wicitaanka raadiyaha "Hornet". Doorka ugu weyn ee diyaaradaha qumaatiga u kaca ahaa in la geliyo iyo in la soo saaro kooxaha duqeymaha, si ay u bixiyaan daboolka hawlgallada noocan oo kale ah, qabashada dagaalka nafsiga ah, iyo doorka kale ee taageerada ee hawlgallada qarsoon gaar ahaan Laos iyo Cambodia inta lagu gudajiray waxa loogu yeero
Dagaal qarsoon.