massacre of Badajoz
1936 CE.
Shown on the map at 38.878°, -6.971°.
The Badajoz massacre occurred in the days after the Battle of Badajoz during the Spanish Civil War. Between 500 and 4,000 civilian and military supporters of the Second Spanish Republic were murdered by the Nationalist forces after the seizure of the town of Badajoz on August 14, 1936.
Text from the Wikipedia article Badajoz massacre, licensed CC BY-SA 4.0.