Lucanamarca massacre
1983 CE.
Shown on the map at -13.808°, -74.352°.
On 3 April 1983, Shining Path rebels killed 69 people in and around the town of Lucanamarca in the Department of Ayacucho, Peru. Shining Path carried out the massacre in reprisal for the killing of its local commander by villagers earlier in the year.
Text from the Wikipedia article 1983 Lucanamarca massacre, licensed CC BY-SA 4.0.