Spain

10/1 — Spain cedes Louisiana to France via the Third Treaty of San Ildefonso.

11/30 — The Balmis Expedition starts in Spain with the aim of vaccinating millions against smallpox in Spanish America and Philippines. In New Orleans, Spanish representatives officially transfer the Louisiana Territory to a French representative. Just 20 days later, France transfers the same land to the United States as the Louisiana Purchase.

9/29 — The Treaty of Lisbon defines the boundaries between Spain and Portugal and abolishes the Couto Misto microstate.

12/29 — El golpe de Estado del general Martínez Campos en Sagunto termina con la fallida Primera República Española y al príncipe Alfonso se le proclama rey de España.

11/27 — Spain declares a protectorate over the north shore of Morocco.

10/1 — Spain adopts women's suffrage.

12/14 — Albania, Austria, Bulgaria, Camboya, Ceilán, Finlandia, Hungría, Irlanda, Italia, Jordania, Laos, Libia, Nepal, Portugal, Rumania y España se unen a las Naciones Unidas mediante la Resolución 109 del Consejo de Seguridad de las Naciones Unidas.

6/15 — After the death of dictator (in 1975) Francisco Franco, the first democratic elections took place in Spain on this day.

7/24 — A high-speed train derails in Spain rounding a curve with an 80 km/h (50 mph) speed limit at 190 km/h (120 mph), killing 78 passengers.

1/26 — An aircraft crashes at Los Llanos Air Base in Albacete, Spain, killing 11 people and injuring 21 others.

10/1 — An independence referendum, declared illegal by the Constitutional Court of Spain, takes place in Catalonia, Spain.

10/27 — Catalonia declares independence from Spain.

3/20 — Alfonso II, king of Asturias (Spain) (b. 759)

6/14 — Guadamir, obispo de Vic (España)