May Revolution
The May Revolution was a direct reaction to Spain's Peninsular War. In 1808, King Ferdinand VII of Spain abdicated in favor 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 February 1, 1810, French troops took Seville and gained control of most of Andalusia. The Supreme Junta retreated to Cadiz and dissolved itself, and the Council of Regency of Spain and the Indies replaced it. News of these events arrived in Buenos Aires on May 18, brought by British ships.
May Conspiracy
In 1844 a group of Czech Radical Democrats which included both Czechs and Czech Germans formed a secret political club called "Repeal". This was named after the mass Irish movement to repeal the Act of Union from 1800. Among the leaders were Josef Václav Frič, Karel Sabina, Karel Sladkovský, Emanuel Arnold and Vilém Gauč. The club attracted radical students and local intelligentsia and remained active after revolutions of 1848 were suppressed.