Temecula Massacre
1846 CE.
Shown on the map at 33.482°, -117.091°.
The Temecula Massacre, also called the Battle of Temecula, took place in December 1846 near the Vail Lake east of present-day Temecula, California, United States. It was part of a series of related events in the Mexican–American War. A combined force of Californio militia and Cahuilla warriors attacked and killed an estimated 33 to 40 Luiseño people. The Mexican authorities in California took military action in retaliation for the Indians' killing of 11 Californio lancers, in what was called the Pauma massacre.
Text from the Wikipedia article Temecula massacre, licensed CC BY-SA 4.0.