Answer:
American neutrality
The president insisted that all government actions be neutral, and that the belligerents must respect that neutrality according to the norms of international law.
The Americans helped the British Empire, French and Portuguese forces defeat and turn back the powerful final German offensive, also the Americans played a role in the Allied final offensive
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Some of the pull factor codes were things like the Homestead acts which were a series of acts on land allocation. For example, if you went westwards, the country would give you a huge piece of land which would become fully yours after five years of successful agricultural business.
The Taj Mahal is an example of Mughal architecture