Outbreak of <a href="https://en.wikipedia.org/wiki/Revolution_of_11_September_1852" id="mw4A" rel="mw:WikiLink" title="Revolution of 11 September 1852">Revolution of September 11</a> resulting in the <a href="https://en.wikipedia.org/wiki/State_of_Buenos_Aires" id="mw4Q" rel="mw:WikiLink" title="State of Buenos Aires">State of Buenos Aires</a> declaring independence as a Republic.