Kunyange zvazvo Ngô Đình Diệm pachake airemekedzwa nokuda kworudzi rwake, kugadzikana kwezvematongerwe enyika uye mitemo inokonzera kukura kwehupfumi nokukurumidza, akatungamirira hurumende yezvematongerwe enyika uye yehurumende. Sarudzo dzaiwanzorongedzwa uye Diệm aifarira vashoma veRoma Katurike panyaya dzakawanda, achitenda kuti vaKaturike "vanonyanya kuvimbika", vanopesana nemakomunisti uye vasingakwanisi kupinda muViet Cong. Mitemo yake yorudzidziso yakaparira kuratidzira kunobva munzanga yechiBuddha pashure pokunge varatidziri vaurawa
paVesak, zuva rokuberekwa kwaBuddha, muna 1963 apo vakanga vachipikisa kurambidzwa kweflag yeBuddha. Chiitiko ichi chakaita kuti vanhu vakawanda varatidzire vachida kuti vanhu vezvitendero zvose vabatane. Nyaya yakakurumbira zvikurusa yakanga iri yaVenerable Thích Quảng Đức, uyo akazvipisa amene kusvikira afa kuti apokanidzire. Mifananidzo yechiitiko ichi yakaita misoro yenhau munyika yose uye yakaunza kunyara kukuru kuna Diệm. Kunetsana hakuna kupedzwa, uye musi waAugust 21, mauto eARVN Special Forces akavimbika kumunun'una wake uye chipangamazano mukuru Ngô Đình Nhu uye achitungamirirwa naLe Quang Tung vakarwisa mapagoda eBuddhist munyika yose, vachisiya huwandu hwevakafa hunofungidzirwa kuti hunosvika mazana. MuUnited States, hurumende yaKennedy yakatanga kunetsekana kuti matambudziko ehurumende yaDiệm akanga ari kukanganisa basa reUnited States rekurwisa chiCommunist muSoutheast Asia, uye kuramba kuri kuwedzera kwaDiệm uye kusashanda pamwe nehurumende yeAmerica. Musi waNovember 1, 1963, nekuronga nekutsigirwa kweCIA nehurumende yaKennedy, maSouth Vietnamese mauto akatungamirwa naDung Văn Minh akaronga coup d'état uye akadonhedza Ngô Đình Diệm, achimuuraya iye nemukoma wake Nhu. ("onawo Ngô Đình Cẩn")