Final answer:
World War I and its aftermath led to the rise of fascism in Europe in the 1920s due to societal trauma and disillusionment, failure of liberal democracy, and economic hardships.
Explanation:
World War I and its aftermath significantly contributed to the rise of fascism in Europe in the 1920s. The trauma, disillusionment, and societal breakdown caused by the war created fertile ground for the emergence of authoritarian ideologies. The failure of liberal democracy and the economic hardships following the war led to the appeal of fascist leaders like Hitler, Mussolini, and Franco.
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