World War II: <a href="https://en.wikipedia.org/wiki/Kingdom_of_Bulgaria" id="mwwA" rel="mw:WikiLink" title="Kingdom of Bulgaria">Bulgaria</a> and the <a href="https://en.wikipedia.org/wiki/Soviet_Union" id="mwwQ" rel="mw:WikiLink" title="Soviet Union">Soviet Union</a> successfully complete their defense of the north bank of the <a href="https://en.wikipedia.org/wiki/Drava" id="mwwg" rel="mw:WikiLink" title="Drava">Drava</a> River as the <a href="https://en.wikipedia.org/wiki/Battle_of_the_Transdanubian_Hills" id="mwww" rel="mw:WikiLink" title="Battle of the Transdanubian Hills">Battle of the Transdanubian Hills</a> concludes.