Corpus Christi massacre
1971 CE.
Shown on the map at 19.444°, -99.168°.
El Halconazo (Spanish: The Falcon Strike), also known as the Corpus Christi Massacre (in Spanish: la matanza del Jueves de Corpus), was a massacre of student demonstrators by members of the Halcones, a state-sponsored paramilitary group, on 10 June 1971 in Mexico City. Occurring during the Mexican Dirty War, the massacre resulted in nearly 120 demonstrators being killed.
Text from the Wikipedia article El Halconazo, licensed CC BY-SA 4.0.