War industry was a major endeavor, massive both in terms of scale and costs involved. New technologies, munitions, weapons had to made and designed. This meant there was a need for massive number of new workers and subsequently a need for new houses where the workers would live. That was the difficulty that the industry had to face.
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The emperor was <span>Vespasian</span>
Because they was a possibility that their family member would not return.
The correct answer is the ''Japanese''.
I could not answer the question only on comments so look at comments and please mark brainliest.
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