Victims of the White Terror (Spain)
In the history of Spain, the White Terror was the series of assassinations realized by the Nationalist faction during the Spanish Civil War (1936–1939), and during the first nine years of the régime of General Francisco Franco. Thousands of victims are buried in hundreds of unmarked common graves (over 2,000), more than 600 in Andalusia alone.
Source: Wikipedia — Victims of the White Terror (Spain) (CC BY-SA 4.0)