Canadian Cree warriors attack the village of Frog Lake, killing nine.

The Cree are a North American Indigenous people, numbering more than 350,000 in Canada, where they form one of the country's largest First Nations macro-communities. There are numerous Cree peoples and several nations closely related to the Cree, these being the: Plains Cree, Woodland Cree, Rocky Cree, Swampy Cree, Moose Cree, and East Cree with the Atikamekw, Innu, and Naskapi being closely related. Also closely related to the Cree are the Oji-Cree and Métis, both nations of mixed heritage, the former with Ojibweg and the latter with European fur traders. Cree homelands account for a majority of eastern and central Canada, from Eeyou Istchee in the East in what is now Quebec to northern Ontario, much of the Canadian prairies, and up into British Columbia and the Northwest Territories. Although a majority of Cree live in Canada, there are small communities in the United States, living mostly in Montana where they share Rocky Boy's Indian Reservation with the Ojibwe (Chippewa) people.

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.

Frog Lake is a Cree community of the Frog Lake First Nation approximately 207 km (129 mi) east of Edmonton, Alberta, Canada. It is located 11 km (6.8 mi) northeast of the Hamlet of Heinsburg and 13 km (8.1 mi) southwest of the Fishing Lake Metis Settlement.

April 2 is the 92nd day of the year in the Gregorian calendar; 273 days remain until the end of the year.