The controversial <a href="https://en.wikipedia.org/wiki/Kharkiv_Pact" id="mwATw" rel="mw:WikiLink" title="Kharkiv Pact">Kharkiv Pact</a> (Russian Ukrainian Naval Base for Gas Treaty) is signed in <a href="https://en.wikipedia.org/wiki/Kharkiv" id="mwAT0" rel="mw:WikiLink" title="Kharkiv">Kharkiv</a>, Ukraine, by <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Ukrainian_President" id="mwAT4" rel="mw:WikiLink" title="Ukrainian President">Ukrainian President</a> <a href="https://en.wikipedia.org/wiki/Viktor_Yanukovych" id="mwAT8" rel="mw:WikiLink" title="Viktor Yanukovych">Viktor Yanukovych</a> and <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Russian_President" id="mwAUA" rel="mw:WikiLink" title="Russian President">Russian President</a> <a href="https://en.wikipedia.org/wiki/Dmitry_Medvedev" id="mwAUE" rel="mw:WikiLink" title="Dmitry Medvedev">Dmitry Medvedev</a>; it was unilaterally terminated by Russia on March 31, 2014.