<a href="https://en.wikipedia.org/wiki/Cold_War" id="mwARs" rel="mw:WikiLink" title="Cold War">Cold War</a>: The <a href="https://en.wikipedia.org/wiki/Truman_Doctrine" id="mwARw" rel="mw:WikiLink" title="Truman Doctrine">Truman Doctrine</a> goes into effect, aiding Turkey and Greece.