late edit: DISCLAIMER: The pictured map is not actually a representation of the territories before colonisation. It's a hypothetical map of what countries there might have been had the continent not been colonised, thus all the names and borders are fictional and have never existed.
For good actual maps, check out native-land.ca.
It's becoming quite the scandal in Canada, where academics are claiming indigenous heritage to get sweet teaching gigs. Buffy St.Marie is the latest greatest liar.