The <a href="https://en.wikipedia.org/wiki/Battle_of_Berezina" id="mwPA" rel="mw:WikiLink" title="Battle of Berezina">Battle of Berezina</a> begins during <a href="https://en.wikipedia.org/wiki/Napoleon" id="mwPQ" rel="mw:WikiLink" title="Napoleon">Napoleon</a>'s retreat from <a href="https://en.wikipedia.org/wiki/Russia" id="mwPg" rel="mw:WikiLink" title="Russia">Russia</a>.