Appeasement, in an international context, is a diplomatic negotiation policy of making political, material, or territorial concessions to an aggressive power with intention to avoid conflict.[1] The term is most often applied to the foreign policy between 1935 and 1939 of the British governments of Prime Ministers Ramsay MacDonald,[a] Stanley Baldwin[b] and most notably Neville Chamberlain[c]
...how did that work out for the appeasers?

Liberals are like a "Slinky". Totally useless, but somehow ya can't help but smile when you see one tumble down a flight of stairs!