Answer:
Following Napoleon giving up political power on France in 1799, He was crowned by himself the emperor in 1804. With Napoleon being a skilled strategist in the military, he succeeded in waging war against multiple unions of European countries and made his empire bigger.
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Accessibility to resources, its hunger for power, the competition between it and others, and great trade relations.
The population of the state decreased
First off, the Allies warned Japan TWICE about the bombings. Also the use of the two atomic bombs finally forced japan to surrender bringing an end to the war and brutal Japanese colonialism era in Korea, parts of China, Philippines, Indonesia and many more. (Japan committed many war crimes in these countries).