Who? - most often applied to the foreign policy of the British Prime Ministers Ramsay Macdonald, Stanley Baldwin and Neville Chamberlain towards Nazi Germany and Hitler and Fascist Italy.
What? - the policy of making concessions to the dictatorial powers in order to avoid conflict, governed Anglo-French foreign policy during the 1930s. It became indelibly associated with Conservative Prime Minister Neville Chamberlain.
When? - Between 1935 and 1939.
Where? - Nazi Germany
Historical Significance - It was the failed attempt to keep peace in Europe from Hitler reign and destruction after he began to invade different lands.