Editing 1931 (section)

===April===
{{Main|April 1931}}
* [[April 1]] – The [[Second Encirclement Campaign against Jiangxi Soviet]] in China is launched by the [[Kuomintang]] government, to destroy the Communist forces in [[Jiangxi]] Province. 
* [[April 6]] – The Portuguese government declares martial law in [[Madeira]] and in the [[Azores]], because of the [[Madeira uprising]] in [[Funchal]].
* [[April 12]] – Municipal elections in Spain, which are treated as a virtual referendum on the monarchy, result in the triumph for the republican parties. 
* [[April 14]] – The [[Second Spanish Republic]] is proclaimed in [[Madrid]]. Meanwhile, as a result of the victory of the [[Republican Left of Catalonia]], [[Francesc Macià]] proclaims in [[Barcelona]] the [[Catalan Republic (1931)|Catalan Republic]], as a state of the Iberian Federation.
* [[April 15]] – Assassination of Giuseppe (Joe the Boss) Masseria, New York City Mafia boss.
* [[April 17]] – After the negotiations between the republican ministers of Spain and Catalonia, the Catalan Republic becomes the [[Generalitat of Catalonia]], a Catalan autonomous government inside the Spanish Republic.
* [[April 22]] – [[Austria]], the [[United Kingdom|UK]], [[Denmark]], [[Weimar Republic|Germany]], [[Kingdom of Italy|Italy]], [[Sweden]] and the [[United States]] recognize the [[Second Spanish Republic|Spanish Republic]].
* [[April 25]] – The automobile manufacturer [[Porsche]] is founded by [[Ferdinand Porsche]] in [[Stuttgart]].