The <a href="https://en.wikipedia.org/wiki/Kellogg–Briand_Pact" id="mwmQ" rel="mw:WikiLink" title="Kellogg–Briand Pact">Kellogg–Briand Pact</a>, renouncing war as an instrument of <a href="https://en.wikipedia.org/wiki/Foreign_policy" id="mwmg" rel="mw:WikiLink" title="Foreign policy">foreign policy</a>, goes into effect (it is first signed in Paris on August 27, 1928, by most leading world powers).