Fighting Waterholes massacre
1840 CE.
Shown on the map at -37.491°, 141.646°.
In April 1840 the Fighting Waterholes massacre of up to 60 Jardwadjali Aboriginal people of the Konongwootong Gundidj clan occurred near the current day Konongwootong reservoir (then known as Den Hills creek), near present-day Coleraine, Victoria, Australia.
Text from the Wikipedia article Fighting Waterholes massacre, licensed CC BY-SA 4.0.