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A new government is formed in Japan under Admiral Mitsumasa Yonai following the resignation of PM Nobuyuki Abe.
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Japanese forces enter French Indochina now being governed by French Vichy.
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The Axis powers of Germany, Italy, and Japan strengthen their ties through the Tripartite Act which makes an enemy of an ally an enemy to all.
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The Japanese naval fleet leaves home port and heads to Hawaii.