Just research Neville Chamberlain; The Sudetanland; "Peace in our time".
History repeats.
Prime Minister Chamberlain: “How horrible, fantastic, incredible it is that we should be digging trenches and trying on gas-masks here because of a quarrel in a far-away country between people of whom we know nothing. It seems still more impossible that a quarrel which has already been settled in principle should be the subject of war.
I can well understand the reasons why the Czech Government have felt unable to accept the terms which have been put before them in the German memorandum. Yet I believe after my talks with Herr Hitler that, if only time were allowed, it ought to be possible for the arrangements for transferring the territory that the Czech Government has agreed to give to Germany to be settled by agreement under conditions which would assure fair treatment to the population concerned.
You know already that I have done all that one man can do to compose this quarrel. After my visits to Germany I have realised vividly how Herr Hitler feels that he must champion other Germans, and his indignation that grievances have not been met before this. He told me privately, and last night he repeated publicly, that after this Sudeten German question is settled, that is the end of Germany’s territorial claims in Europe.”