President <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Ngô_Đình_Diệm" id="mwzQ" rel="mw:WikiLink" title="Ngô Đình Diệm">Ngô Đình Diệm</a> of <a href="https://en.wikipedia.org/wiki/South_Vietnam" id="mwzg" rel="mw:WikiLink" title="South Vietnam">South Vietnam</a> becomes <a href="https://en.wikipedia.org/wiki/Ngo_Dinh_Diem_presidential_visit_to_Australia" id="mwzw" rel="mw:WikiLink" title="Ngo Dinh Diem presidential visit to Australia">the first foreign head of state to make a state visit to Australia</a>.