Congress passed the treaty in order to relocate the Indian tribes living east of the Mississippi River to lands in the west.
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The May Revolution (Spanish: Revolución de Mayo) was a week-long series of events that took place from May 18 to 25, 1810, in Buenos Aires, capital of the Viceroyalty of the Río de la Plata.
The USA became involved in Vietnam because it feared the spread of communism. The United States got involved in the Vietnam conflict to keep communism from spreading throughout Southeast Asia.