The correct answer to this open question is the following.
The effect that industrialization and westward migration into the Midwest of the US had on Native American reservations in places like Oklahoma and other areas where Indian reservations existed were the following.
Many serious conflicts arose when the white settlers started to occupy the Native American Indian territories. Let's have in mind that the Indians had lived in their lands for years and respected nature for all the things it provided. White settler's perspective on land was totally different. They wanted the land to occupy it and exploit the raw materials and natural resources in order to make a profit.
Indians even supported and sided with the British troops during the War of 1812, expecting the British to win and recover their former lands.
