World War II: The <a href="https://en.wikipedia.org/wiki/Wehrmacht" id="mwxA" rel="mw:WikiLink" title="Wehrmacht">Wehrmacht</a> starts a three-day <a href="https://en.wikipedia.org/wiki/Viannos_massacres" id="mwxQ" rel="mw:WikiLink" title="Viannos massacres">retaliatory</a> operation targeting several Greek villages in the region of <a href="https://en.wikipedia.org/wiki/Viannos" id="mwxg" rel="mw:WikiLink" title="Viannos">Viannos</a>, whose death toll would eventually exceed 500 persons.