World War II: Opening day of the Soviet Union's <a href="https://en.wikipedia.org/wiki/Operation_Bagration" id="mw2w" rel="mw:WikiLink" title="Operation Bagration">Operation Bagration</a> against the <a href="https://en.wikipedia.org/wiki/Army_Group_Centre" id="mw3A" rel="mw:WikiLink" title="Army Group Centre">Army Group Centre</a>.