| The May Revolution was a week-long series of revolutionary events that took place from May 18 to May 25, 1810, in Buenos Aires, capital of the Viceroyalty of the Río de la Plata, a colony of the Spanish Empire which included the present-day nations of Argentina, Bolivia, Paraguay and Uruguay. The consequences of these events were the ousting of Viceroy Baltasar Hidalgo de Cisneros and the establishment of a local government, the Primera Junta on May 25. These events are commemorated in Argentina as May Week (Spanish: Semana de Mayo).
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