The five-week <a href="https://en.wikipedia.org/wiki/Battle_of_Lake_Poyang" id="mwIQ" rel="mw:WikiLink" title="Battle of Lake Poyang">Battle of Lake Poyang</a> begins, in which the forces of two Chinese rebel leaders (<a href="https://en.wikipedia.org/wiki/Chen_Youliang" id="mwIg" rel="mw:WikiLink" title="Chen Youliang">Chen Youliang</a> and <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Zhu_Yuanzhang" id="mwIw" rel="mw:WikiLink" title="Zhu Yuanzhang">Zhu Yuanzhang</a>) meet to decide who will supplant the <a href="https://en.wikipedia.org/wiki/Yuan_dynasty" id="mwJA" rel="mw:WikiLink" title="Yuan dynasty">Yuan dynasty</a>.