<a href="https://en.wikipedia.org/wiki/July_Revolt_of_1927" id="mw6Q" rel="mw:WikiLink" title="July Revolt of 1927">Massacre of July 15, 1927</a>: Eighty-nine protesters are killed by Austrian police in <a href="https://en.wikipedia.org/wiki/Vienna" id="mw6g" rel="mw:WikiLink" title="Vienna">Vienna</a>.