The <a href="https://en.wikipedia.org/wiki/Battle_of_Boquerón_(1932)" id="mw_A" rel="mw:WikiLink" title="Battle of Boquerón (1932)">Battle of Boquerón</a>, the first major battle of the <a href="https://en.wikipedia.org/wiki/Chaco_War" id="mw_Q" rel="mw:WikiLink" title="Chaco War">Chaco War</a>, commences.