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.
Cinco de Mayo
Cinco de Mayo has its roots in the Second French intervention in Mexico, which took place in the aftermath of the 1846–48 Mexican–American War and the 1858–61 Reform War. The Reform War was a civil war that pitted Liberals (who believed in separation of church and state, and freedom of religion) against Conservatives (who favored a tight bond between the Catholic Church and the Mexican state). These wars nearly bankrupted the Mexican Treasury. On July 17, 1861, Mexican President Benito Juárez issued a moratorium in which all foreign debt payments would be suspended for two years. In response, Britain, France, and Spain sent naval forces to Veracruz to demand reimbursement. Britain and Spain negotiated with Mexico and withdrew, but France, at the time ruled by Napoleon III, decided to use the opportunity to establish an empire in Mexico that would favor French interests, the Second Mexican Empire. The empire was part of an envisioned "Latin America" (term used to imply cultural kinship of the region with France) that would rebuild French influence in the American continent and exclude Anglophone American territories.