A group of imperial guards, led by Trịnh Duy Sản, <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Trần_Cảo_Rebellion" id="mwTA" rel="mw:WikiLink" title="Trần Cảo Rebellion">murdered</a> Emperor <a href="https://en.wikipedia.org/wiki/Lê_Tương_Dực" id="mwTQ" rel="mw:WikiLink" title="Lê Tương Dực">Lê Tương Dực</a> and fled, leaving the capital <a href="https://en.wikipedia.org/wiki/Hanoi" id="mwTg" rel="mw:WikiLink" title="Hanoi">Thăng Long</a> undefended.