World War II: <a href="https://en.wikipedia.org/wiki/Soviet_Union" id="mwqg" rel="mw:WikiLink" title="Soviet Union">Soviet</a> and <a href="https://en.wikipedia.org/wiki/Kingdom_of_Bulgaria" id="mwqw" rel="mw:WikiLink" title="Kingdom of Bulgaria">Bulgarian</a> forces <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Vienna_Offensive" id="mwrA" rel="mw:WikiLink" title="Vienna Offensive">capture Vienna</a>.