In 1815, Gia Long claimed 13 countries as Vietnamese vassals, including Luang Prabang, Vientiane, Burma, Tran Ninh in eastern Laos, and two countries called "Thủy Xá Quốc" and "Hỏa Xá Quốc", which were actually Malayo-Polynesian Jarai tribes living between Vietnam and Cambodia.
Pada 1815, Gia Long mengklaim 13 negara sebagai pengikut Vietnam, termasuk Luang Prabang, laos, Vientiane, Burma, Tran Ninh di Laos timur, dan dua negara yang disebut "Thủy Xá Quốc" dan "Hỏa Xá Quốc", yang sebenarnya adalah suku Jarai Malayo-Polinesia hidup di antara Vietnam dan Kamboja.