Frog Lake Massacre
1885 CE.
Shown on the map at 53.831°, -110.359°.
The Frog Lake Massacre was part of the Cree uprising during the North-West Rebellion in western Canada. Led by Wandering Spirit, Cree men attacked and killed nine officials, clergy and settlers in the small settlement of Frog Lake, at the time in the District of Saskatchewan in the North-West Territories on April 2, 1885. (The location, about 200 km east of Edmonton, is now within the province of Alberta.)
Text from the Wikipedia article Frog Lake Massacre, licensed CC BY-SA 4.0.