defeat the Oyirad Mongol hordes
... that Ming China's armies deployed their cannons to defeat the Oyirad Mongol hordes at the Kerulen and Tula rivers in 1414?
... that <a class="mw-redirect" href="./Ming_Dynasty" id="mwBNE" rel="mw:WikiLink" title="Ming Dynasty">Ming China</a>'s armies deployed their cannons to <b id="mwBNI"><a href="./Yongle_Emperor's_campaigns_against_the_Mongols" id="mwBNM" rel="mw:WikiLink" title="Yongle Emperor's campaigns against the Mongols">defeat the Oyirad Mongol hordes</a></b> at the <a href="./Kherlen_River" id="mwBNQ" rel="mw:WikiLink" title="Kherlen River">Kerulen</a> and <a href="./Tuul_River" id="mwBNU" rel="mw:WikiLink" title="Tuul River">Tula</a> rivers in 1414?