sentences:  In the area of the Indian Reserve in what is now the United States, after coming under firm control of the new country, was gradually settled by European Americans and divided into territories and states, starting with the Northwest Territory.Most (but not all) Indians in the area of the former Reserve were relocated further west under policies of Indian Removal.After the Louisiana Purchase, the Indian Intercourse Act of 1834 created an Indian Territory west of the Mississippi River as a destination, until it too was divided into territories and states for European American settlement, leaving only modern Indian Reservations inside the boundaries of U.S. states.