May Revolution

The May Revolution (Spanish: Revolución de Mayo) was a week-long series of events that took place from 18 to 25 May 1810, in Buenos Aires, capital of the Viceroyalty of the Río de la Plata. This Spanish colony included roughly the territories of present-day Argentina, Bolivia, Paraguay, Uruguay, and parts of Brazil. The result was the removal of Viceroy Baltasar Hidalgo de Cisneros and the establishment of a local government, the Primera Junta (First Junta), on 25 May.

The May Revolution was a direct reaction to Napoleon's invasion of Spain. In 1808, King Ferdinand VII abdicated in favour of Napoleon, who granted the throne to his brother, Joseph Bonaparte. A Supreme Central Junta led resistance to Joseph's government and the French occupation of Spain, but eventually suffered a series of reversals that resulted in the Spanish loss of the northern half of the country. On 1 February 1810, French troops took Seville and gained control of most of Andalusia. The Supreme Junta retreated to Cádiz, formed the Council of Regency of Spain and the Indies to govern, and dissolved itself. News of these events arrived in Buenos Aires on 18 May, brought by British ships.