<a href="https://en.wikipedia.org/wiki/First_Balkan_War" id="mwvA" rel="mw:WikiLink" title="First Balkan War">First Balkan War</a>: King <a href="https://en.wikipedia.org/wiki/Peter_I_of_Serbia" id="mwvQ" rel="mw:WikiLink" title="Peter I of Serbia">Peter I of Serbia</a> issues a declaration "To the Serbian People", as his country joins the war.