<a href="https://en.wikipedia.org/wiki/First_Balkan_War" id="mwnw" rel="mw:WikiLink" title="First Balkan War">First Balkan War</a>: The <a href="https://en.wikipedia.org/wiki/Battle_of_Kumanovo" id="mwoA" rel="mw:WikiLink" title="Battle of Kumanovo">Battle of Kumanovo</a> between the Serbian and Ottoman armies begins.