In 1940, Hitler indicated his switch to military conquest rather than annexation by invading Belgium and the Netherlands/ Holland.
The small states of Belgium and The Netherlands / Holland were members of the Globalist League of Nations but claimed to be "neutral." In reality, under the pressure and influence of mighty England and France who were also members of the League of Nations the two mini-states had been assisting the Allies in their preparation for an attack upon Germany which had quit the League of Nations in 1933. On May 10, 1940, Hitler ordered the invasion of Belgium, Netherlands, and Luxemburg.