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Answer:
How did Congress ensure that the military had enough troops to fight the war? They created the selective service system. What federal agencies help to control American industries during the war? (WIB) war industries Board; they coordinated the production of war materials.
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Assuming that you're referring to the years of cold war,
Many Citizens started to believed republican party because of the potential threat from Uni Soviet.
Republican tend to favor the policies that strengthen our military, and the majority of people in that period needed that feeling of protection from the Government.