What was the cause of the immediate outbreak of World War II? 🔊
The immediate outbreak of World War II was triggered by Germany's invasion of Poland on September 1, 1939. This act of aggression followed a series of aggressive expansions and pervasive militarization by Nazi Germany under Adolf Hitler, including the reoccupation of the Rhineland and the annexation of Austria and Czechoslovakia. The invasion prompted Britain and France to declare war on Germany on September 3, 1939, as they sought to uphold their commitments to Poland. This marked the beginning of a global conflict that would result in enormous casualties and significant geopolitical changes across the world.
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