The <a href="https://en.wikipedia.org/wiki/Defenestrations_of_Prague" id="mwMQ" rel="mw:WikiLink" title="Defenestrations of Prague">Second Defenestration of Prague</a> precipitates the <a href="https://en.wikipedia.org/wiki/Thirty_Years'_War" id="mwMg" rel="mw:WikiLink" title="Thirty Years' War">Thirty Years' War</a>.