1910 nî ê sî, chiah-ê kok-ka tī Buenos Aires tiàu-khui tē 4 kài Bí-chiu Kok-ka Kok-chè Hoē-gī, in kā Bí-chiu Kiōng-hô-kok Kok-chè Liân-bêng kái-miâ chò Bí-chiu Kiōng-hô-kok Liân-bêng (Union of American Republics). Che liáu-āu, koh tī 1948 nî tiàm Bogotá tiàu-khui tē 9 kài Bí-chiu Kok-ka Hoē-gī, kāng hit nî ê 4 goe̍h 30, 21 kok chhiam tiâu-iok, chit-ê tiâu-iok hō-chò Bí-chiu Kok-ka Cho͘-chit Hiàn-chiong (Charter of the Organization of American States). Che tō sī taⁿ Bí-chiu Kok-ka Cho͘-chit ê goân-thâu, iā chit-ê cho͘-chit chū-án-ne tī 1951 nî 12--goe̍h khai-sí ūn-chok.