One of the best books that you can ever read on the plight of the Native American tribes is Bury My Heart At Wounded Knee by Dee Brown. I first read it when I was not long out of school and it remains on my bookshelves at home still today.
In 1800 there were an estimated 30 million Buffalo roaming the Great Plains. The Indian tribes only took what they needed for clothing,shelter,food and medicines and no more. The fashion in Europe was for top hats so the Buffalo
!as well as Beavers,were hunted by white hunters for this 'lucrative' trade. Then came the Settlers,Wagon Trains moving West,Cattle Ranchers and worst of all the Railroads. The Kansas Pacific Railroad,as a marketing ploy,promised travellers that the trains would stop near any passing Buffalo herd so they could be shot at from the comfort of the railway carriage. Then the Goldrush and the Indian Wars with the US Cavalry.
By the last quarter of the 19th century the Buffalo on the Great Plains had by then been needlessly massacred and had dwindled to the last 1000 or so. The Prairies were white with Buffalo remains and huge mountains of bones were accumulated to be shipped back East to be ground into fertiliser!
The means that had provided life as they knew it for the Plains Indians had disappeared and the remnants of their nations were banished to the Reservations!
One of the first Indian tribes to encounter White Settlers were the Cherokee's in the Appalachian States. They were known as the "Civilised Tribes" and helped the earliest settlers to survive. They taught the settlers how to hunt,find the plants that could be used as medicines and to survive the changing seasons in the wild. Descendants of the earliest settlers still recognise this and the debt owed to the Cherokee. But the next successive influxes of settlements were of the more greedy and ever more hostile variety. And the Indians were viewed as "savages" to be got rid of and moved on. The 'Civilised Tribes' were eventually banished hundreds and hundreds of miles to Oklahoma in the infamous episode known as "The Trail of Tears". Forced to live on scant Reservations with changes to their ancient lifestyles and customs that would have been the then equivalent of finding themselves on the surface of the Moon!
I remember a line in one of Clint Eastwood's films where the old Indian Chief is heard to lament "The White Man called us the Civilised Tribes. We were known as the Civilised Tribes because we were easier to sneak up on"!