May Revolution
The mutiny of Aranjuez in 1808 led King Charles IV of Spain to abdicate in favor of his son, Ferdinand VII. Charles IV requested that Napoleon restore him to the throne; instead, Napoleon crowned his own brother, Joseph Bonaparte, as the new Spanish King. These events are known as the Abdications of Bayonne. Joseph's coronation was met with severe resistance in Spain, which started the Peninsular War, and the Supreme Central Junta took power in the name of the absent king. This also led to Spain switching allegiances from France to Britain. France eventually invaded Sevilla, and a Council of Regency based in Cadiz replaced the disbanded Supreme Central Junta.
Causes of the May Revolution
The United States had emancipated themselves from the Kingdom of Great Britain in 1776, which provided a tangible example that led Criollos to believe that revolution and independence from Spain could be realistic aims. In the time between 1775 and 1783 the Thirteen Colonies started the American Revolution, first rejecting the governance of the Parliament of Great Britain, and later the British monarchy itself, and waged the American Revolutionary War against their former rulers. The changes were not only political, but also intellectual and social, combining both a strong government with personal liberties. The text of the Declaration of Independence stated that all men are created equal (and thus become equal before the law), and had unalienable rights to life, liberty and the pursuit of happiness. They had also chosen a republican form of government, instead of keeping a monarchic one. Even more, the fact that Spain aided the colonies in their struggle against Britain weakened the argument that ending allegiance to the mother country could be considered a crime.