Were there any tribes that had land on both sides of either border, and if so how has that been handled through history? Considering how both borders are in part arbitrary straight lines, I'd imagine that there's a chance they might have gone right through tribal lands. Was this ever an issue, or did the forced resettlement programs of the past negate this?
There are Mohawk reserves in New York State, as well as in Quebec and Ontario. Akwesasne is a Mohawk community that straddles the NY/QC/ON border, technically it is three reserves but it is one community. There is a Canada/US agreement allowing free movement of natives across the border, so they don't have to deal with that hassle.