chemical attacks
...that the United States threatened privately to cut off aid to Ngo Dinh Diem's Catholic regime as a result of chemical attacks on Buddhist protestors in Huế, Vietnam in 1963?
...that the <a href="./United_States" id="mwD3s" rel="mw:WikiLink" title="United States">United States</a> threatened privately to cut off aid to <a href="./Ngo_Dinh_Diem" id="mwD3w" rel="mw:WikiLink" title="Ngo Dinh Diem">Ngo Dinh Diem</a>'s Catholic regime as a result of <b id="mwD30"><a class="mw-redirect" href="./Hue_chemical_attacks" id="mwD34" rel="mw:WikiLink" title="Hue chemical attacks">chemical attacks</a></b> on <a href="./Buddhism" id="mwD38" rel="mw:WikiLink" title="Buddhism">Buddhist</a> protestors in <a href="./Huế" id="mwD4A" rel="mw:WikiLink" title="Huế">Huế</a>, <a href="./Vietnam" id="mwD4E" rel="mw:WikiLink" title="Vietnam">Vietnam</a> in 1963?