The <a href="https://en.wikipedia.org/wiki/Battle_of_Berestechko" id="mwQg" rel="mw:WikiLink" title="Battle of Berestechko">Battle of Berestechko</a> between <a href="https://en.wikipedia.org/wiki/Polish–Lithuanian_Commonwealth" id="mwQw" rel="mw:WikiLink" title="Polish–Lithuanian Commonwealth">Poland</a> and <a href="https://en.wikipedia.org/wiki/Crimean_Khanate" id="mwRA" rel="mw:WikiLink" title="Crimean Khanate">Ukraine</a> starts.