It was because it was the year where the democratic national conventions has been sabotaged by 8 activists.
The westward expansion (A.K.A Manifest Destiny) was believed, by the Americans, that they could claim that land so they could spread their government and rule westward.
They also believed they were protected by a higher being, Providence.
The Munich Pact was an example of awful foreign policy, which allowed Hitler to annex Czechoslovakia.
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