How did appeasement play a role in starting ww2?

While the English Prime Minister Neville Chamberlain was hailed as a "keeper of the peace" by many, his inaction against Nazi Germany after the annexation of the Sudetenland (in Czechoslovakia) and the Anschluss  could be argued to have been foolish. Germany was quite weak early on, and an organized battle with the League of Nations could have fairly easily returned order Europe.

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