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 1958 crisis in France
The May 1958 crisis (or Algiers putsch or the coup of 13 May) was a political crisis in France during the turmoil of the Algerian War of Independence (1954–62) which led to collapse of the Fourth Republic and its replacement by the Fifth Republic led by Charles de Gaulle who returned to power after a twelve-year absence. It started as a political uprising in Algiers on 13 May 1958 and then became a military coup d'état led by a coalition headed by Algiers deputy and reserve airborne officer Pierre Lagaillarde, French Generals Raoul Salan, Edmond Jouhaud, Jean Gracieux, and Jacques Massu, and by Admiral Philippe Auboyneau, commander of the Mediterranean fleet. The coup was supported by former Algerian Governor General Jacques Soustelle and his activist allies.