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.
Baden Revolution
Their high points were the Hecker uprising in April 1848, the Struve Putsch of September 1848 and the rebellion as part of the Imperial Constitution campaign ("Reichsverfassungskampagne") in May 1849 which assumed civil war-like proportions and was also known as the May Revolution. The rebellion ended on 23 July 1849 with the military defeat of the last revolt and the capture of Rastatt Fortress by federal troops under Prussian leadership.