When American play ball with it native population we force them to sign treaties then break and make sign the next one worst then last. Worst case you mimic southern gentry slave holding society in the image of the majority of the founding fathers and are Congress will push bill to remove your people. Because fuck it we not stop settler from taking your land by enforcing are own treaties.
Mind the type people that do settler I honestly wonder "frontier man" I wonder how much about treaties,tribe or even the feds. I take tribes back if they work intermarriage they cared but means they normal do care about reputation and they are really living deep out of they or their are merchants.
That thing America history deal with it sometimes peaceful sometime warlike tribes and are combo of ethic and cultural cleansing in the later haft on 1900 century is far too well document.