<a href="https://en.wikipedia.org/wiki/Cold_War" id="mw7g" rel="mw:WikiLink" title="Cold War">Cold War</a>: Opening date for signature of the <a href="https://en.wikipedia.org/wiki/Antarctic_Treaty_System" id="mw7w" rel="mw:WikiLink" title="Antarctic Treaty System">Antarctic Treaty</a>, which sets aside Antarctica as a scientific preserve and bans military activity on the continent.