Alma Massacre
1880 CE.
Shown on the map at 33.413°, -108.837°.
The Alma Massacre involved an April 28, 1880, Chiricahua Apache raid on United States settlers' homes around Alma, New Mexico Territory. At least 41 people were killed during the raid.
Text from the Wikipedia article Alma Massacre, licensed CC BY-SA 4.0.