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 Coup (Poland)
The May Coup ( or ) was a coup d'état carried out in Poland by Marshal Józef Piłsudski between 12 and 14 May 1926. The coup overthrew the government of President Stanisław Wojciechowski and Prime Minister Wincenty Witos. A new government was installed, headed by Lwów Polytechnic Professor Kazimierz Bartel. The events were partly inspired by the need for extraordinary measures in the face of newly emerging threats to the stability of Poland's independence by Piłsudski's own assessment of the foreign treaties signed by Weimar Germany with France in 1925 (fundamentally abandoning Poland) and with the Soviet Russia in April 1926, to which Poland's representatives had not been invited.