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.
May Revolution
Manuel Belgrano stood near a window and, in the event of a problematic development, he would give a signal by waiving a white cloth, upon which the people gathered in the Plaza would force their way into the Cabildo. However, there were no problems and this emergency plan was not implemented. The historian Vicente Fidel López revealed that his father, Vicente López y Planes, who was present at the event, saw that Mariano Moreno was worried near the end in spite of the majority achieved. Moreno told Planes that the Cabildo was about to betray them.