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 Fourth Square
The May 4th Movement (五四运动, wǔsì yùndòng) was sparked by Article 156 of the Treaty of Versailles which transferred German concessions in Shandong including Qingdao to Japan rather than returning sovereign authority to China. Chinese outrage over this provision ignited mass student demonstrations in Beijing on May 4th, 1919 which resulted in the cultural movement know today as the May Fourth Movement. The May 4th Movement influenced the Chinese delegation not to sign the Treaty of Versailles. China declared the end of its war against Germany in September 1919 and signed a separate treaty in 1921.