Treznea massacre
1940 CE.
Shown on the map at 47.106°, 23.108°.
The Treznea massacre occurred in the village of Treznea, Sălaj in north-western Transylvania on 9 September 1940, in the immediate aftermath of the Second Vienna Award, when Romania ceded Northern Transylvania to Hungary. The massacre was perpetrated by Hungarian Army troops with aid from some locals; 93 ethnic Romanians and Jews were killed.
Text from the Wikipedia article Treznea massacre, licensed CC BY-SA 4.0.