My research on Canadian Indian conflicts in the 19th century suggests that conflict between tribes was more severe than with the Europeans (expect for the second Metis rebellion). In particular, the conflicts between the Blackfoot and Cree tribes were especially large scale, with the last major battle occurring at Belly River in 1870.
Another notable battle occurred at Cypress Hills in 1867, in which a mixed group of Crows and other Native American groups were surprised by Blackfoot, resulting in a massacre.
Are these battle sites open to the public for those interested in touring battle fields? Or are these locations all now on private property?