The act authorized the president to grant Indian tribes unsettled western prairie land in exchange for their desirable territories within state borders (especially in the Southeast), from which the tribes would be removed.
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The Great Migration was the movement of some six million African Americans from rural areas of the Southern states of the United States to urban areas in the Northern states between 1916 and 1970.
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Invasions by Barbarian tribes
Economic troubles and overreliance on slave labor
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Earthquake and Tsunamis
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Las invasiones británicas del Río de la Plata fueron una serie de intentos fallidos británicos en la actual Argentina y Uruguay de tomar posesión de áreas en el Virreinato colonial español del Río de la Plata que estaban situadas alrededor del Río de la Plata en América del Sur. Como parte de las Guerras Napoleónicas, entre 1806 y 1807, las invasiones tuvieron lugar cuando España era aliada de la Francia napoleónica.
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