The alliance involved was presumably, the Southeast Asia Treaty Organization (SEATO), and Australia was providing military assistance because South Vietnam, a signatory to SEATO, had apparently requested it.
” संभवतः इसमें शामिल गठबंधन सीटो (SEATO) था, ऑस्ट्रेलिया सैन्य सहायता इसलिए दे रहा था क्योंकि दक्षिणी वियतनाम, जो कि सीटो (SEATO) का एक हस्ताक्षरकर्ता था, ने संभवतः इसका निवेदन किया था।