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Imperial Japan grew as a world power during the early years of the 20th century. They were prominent and became members of the League of Nations after WW1. The territorial expansion of Japan was a deep concern for many nations of the world when Japan invaded China in 1931. The Chinese tried to defend themselves but the advanced military strength of Japan suppressed and annihilated Chinese resistance. Invading other countries is the reason for the concern of other nations.

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12y ago

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