European arrived during 15-18th century,began to push native people off their land by two ways--first is persuading them to go away voluntarily like giving them horses,the second way is more forcibly--use alcohol and diseases to kill them.About 90 per cent of first nation people dead by first 100years of european settlement.
Then,European began politicies of assimilation,also called as " civiling "--removing nativeness and trying to make them white( residential schools)