The Greek Army <a href="https://en.wikipedia.org/wiki/3_September_1843_Revolution" id="mwdw" rel="mw:WikiLink" title="3 September 1843 Revolution">rebels</a> (<a href="https://en.wikipedia.org/wiki/Old_Style_and_New_Style_dates" id="mweA" rel="mw:WikiLink" title="Old Style and New Style dates">OS date</a>: September 3) against the autocratic rule of king <a href="https://en.wikipedia.org/wiki/Otto_of_Greece" id="mweQ" rel="mw:WikiLink" title="Otto of Greece">Otto of Greece</a>, demanding the granting of a constitution.