World War II: The <a href="https://en.wikipedia.org/wiki/Battle_of_Romania" id="mw5w" rel="mw:WikiLink" title="Battle of Romania">Battle of Romania</a> begins with a major <a href="https://en.wikipedia.org/wiki/Soviet_Union" id="mw6A" rel="mw:WikiLink" title="Soviet Union">Soviet Union</a> offensive.