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.
Argentine War of Independence
The "Día de la Revolución de Mayo" (May Revolution Day) on May 25 is an annual holiday in Argentina to commemorate the First National Government (and the creation of the Primera Junta), one of the significant events in the history of Argentina. These and other events of the week leading to this day are referred to as the "Semana de Mayo" (May Week).