If it is, Japan's motivation to seek more territories in Asia was for more resources during WWII. The U.S cut all resources going from the U.S to WWII.
<em>The idea of economic stability through conquering territories</em>
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Explanation:
Many of the soldiers going to the army in Japan by the 1930s were from poor households, this meant that a lot of families were loosing their young men, sometimes the support of the house. This situation made the depression even worse. Japan as a country had the idea that by conquering more territories they would be able to have more resources and change their reality, it worked as a promise of economic stability that motivated the masses, even though these actions of war did little overall in that regard.
The documents contained details about decisions to expand the war, and confirmed what many Americans had long believed: the government had not been honest with them.