The division of Spain into Captaincies General dates from 1705, when they were adjusted to the old kingdoms that constituted the Hispanic Monarchy.
They were thirteen regions: Andalusia, Aragon, Burgos, Canary Islands, Castilla la Vieja, Catalonia, Extremadura, Galicia, Coast of Granada, Guipúzcoa, Mallorca, Navarra and Valencia.
After the proclamation of the Second Spanish Republic in 1931, a government decree dissolved the military regions and replaced them with Organic Divisions.
[1] In July 1936, General Enrique Salcedo Molinuevo was the head of the VIII Organic Division.
In July 1939, after the end of the Spanish Civil War the military regions were re-established.