Which was the biggest cause of ww2? 1) The Munich Agreement? or 2) Hitler's invasion of Czechoslovakia?

In my interpretation, the biggest cause of ww2, based on the Munich Conference of September 1938, and Hitlers invasion of Czechoslovakia March 1939, was the Munich Conference --- partly. This because it proved that weakness in the face of aggression only brought more aggression; giving Hitler Sudetenland (September 1938) was solid ground and power provided for Nazi Germany; which will eventually break its promise (in march 1939) and attack the rest of Czechoslovakia. What was unknown from the very …

…attack all the weak countries as Czechoslovakia to create his empire. Therefore I come to the conclusion that Hitler would have invaded Czechoslovakia or Sudetenland even if it wasnt given to him, because he had the military power he had support and his purpose was to expand. Furthermore none of the above causes could be qualified as the biggest cause for ww2; as they both compromise, contributed to Hitlers menace on a second world war.