Switzerland
History
Switzerland was not invaded during either of the world wars. During World War I, Switzerland was home to Vladimir Illych Ulyanov (Vladimir Lenin) and he remained there until 1917. Swiss neutrality was seriously questioned by the Grimm–Hoffmann Affair in 1917, but it was short-lived. In 1920, Switzerland joined the League of Nations, which was based in Geneva, on condition that it was exempt from any military requirements.
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