Mongol invasion of the Cumans: <a href="https://en.wikipedia.org/wiki/Battle_of_the_Kalka_River" id="mwIw" rel="mw:WikiLink" title="Battle of the Kalka River">Battle of the Kalka River</a>: <a href="https://en.wikipedia.org/wiki/Mongol_Empire" id="mwJA" rel="mw:WikiLink" title="Mongol Empire">Mongol</a> armies of <a href="https://en.wikipedia.org/wiki/Genghis_Khan" id="mwJQ" rel="mw:WikiLink" title="Genghis Khan">Genghis Khan</a> led by <a href="https://en.wikipedia.org/wiki/Subutai" id="mwJg" rel="mw:WikiLink" title="Subutai">Subutai</a> defeat <a href="https://en.wikipedia.org/wiki/Kievan_Rus'" id="mwJw" rel="mw:WikiLink" title="Kievan Rus'">Kievan Rus'</a> and <a href="https://en.wikipedia.org/wiki/Cumans" id="mwKA" rel="mw:WikiLink" title="Cumans">Cumans</a>.