- June - Spanish regional federation of international founded at Barcelona.
- December - Amadeo of Savoy become King.
- April - Carlist War begins.
- September - Congress of international at the Hague and final breach between Mark and Bakunin.
- December - Congress of Regional Federation of International at Cordova.
- February - Abdication of Amadeo. The proclamation of the Democratic Federal Republic announced in the same month.
- June - Insurrection in Catalonia.