Darkey Flat massacre
1845 CE.
Shown on the map at -28.097°, 151.798°.
The Darkey Flat Massacre is a massacre of Aboriginal Australians by European settlers that supposedly took place some time in the 1840s. There is no eyewitness, first-hand, or clear documentary evidence relating to the massacre and there is some doubt as to whether it actually occurred.
Text from the Wikipedia article Darkey Flat massacre, licensed CC BY-SA 4.0.