<a href="https://en.wikipedia.org/wiki/Battle_of_Hulao" id="mwGw" rel="mw:WikiLink" title="Battle of Hulao">Battle of Hulao</a>: <a href="https://en.wikipedia.org/wiki/Emperor_Taizong_of_Tang" id="mwHA" rel="mw:WikiLink" title="Emperor Taizong of Tang">Li Shimin</a>, the son of the Chinese emperor <a href="https://en.wikipedia.org/wiki/Emperor_Gaozu_of_Tang" id="mwHQ" rel="mw:WikiLink" title="Emperor Gaozu of Tang">Gaozu</a>, defeats the numerically superior forces of <a href="https://en.wikipedia.org/wiki/Dou_Jiande" id="mwHg" rel="mw:WikiLink" title="Dou Jiande">Dou Jiande</a> near the <a href="https://en.wikipedia.org/wiki/Hulao_Pass" id="mwHw" rel="mw:WikiLink" title="Hulao Pass">Hulao Pass</a> (<a href="https://en.wikipedia.org/wiki/Henan" id="mwIA" rel="mw:WikiLink" title="Henan">Henan</a>). This victory decides the outcome of the <a href="https://en.wikipedia.org/wiki/Transition_from_Sui_to_Tang" id="mwIQ" rel="mw:WikiLink" title="Transition from Sui to Tang">civil war</a> that followed the <a href="https://en.wikipedia.org/wiki/Sui_dynasty" id="mwIg" rel="mw:WikiLink" title="Sui dynasty">Sui dynasty</a>'s collapse in favour of the <a href="https://en.wikipedia.org/wiki/Tang_dynasty" id="mwIw" rel="mw:WikiLink" title="Tang dynasty">Tang dynasty</a>.