World War II: The <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Vistula–Oder_Offensive" id="mw5Q" rel="mw:WikiLink" title="Vistula–Oder Offensive">Vistula–Oder Offensive</a> forces German troops out of <a href="https://en.wikipedia.org/wiki/Warsaw" id="mw5g" rel="mw:WikiLink" title="Warsaw">Warsaw</a>.