Report Abuse. Nazi Germany had been annexing territory in Europe during the 1930s, and Britain and France had adopted a policy of appeasement in order to prevent a war.The 1938 Munich Agreement gave Hitler the German-speaking regions of Czechoslovakia, but then the Nazis seized the rest of the country.This showed that appeasement had failed. Britain and France then made a pact with Poland promising to declare war if Germany invaded.On September 1, 1939 the Germans invaded Poland, and World War II began.eport Abuse. Nazi Germany had been annexing territory in Europe during the 1930s, and Britain and France had adopted a policy of appeasement in order to prevent a war.