Green Bay massacre
1978 CE.
Shown on the map at 17.940°, -76.878°.
The Green Bay Massacre was a covert operation on 5 January 1978, in which five Jamaica Labour Party supporters were shot dead after being lured into an ambush at the Green Bay Firing Range by members of the Jamaica Defence Force.
Text from the Wikipedia article Green Bay Massacre, licensed CC BY-SA 4.0.