Between 1870 and 1900, a number of new nations were created from a. austria-hungary/ b. the russian empire / c. great britain / b. the ottoman empire

Its not the Russian Empire

believe me I put it and its wrong

as general terms,  indian territory,  the indian territories, or  indian country  describe an evolving land area set aside by the  united states government  for the relocation of  native americans  who held  aboriginal title  to their land. in general, the tribes ceded land they occupied in exchange for  land grants  in 1803. the concept of an indian territory was an outcome of the 18th- and 19th-century policy of  indian removal. after the  civil war(1861–1865), the policy of the government was one of  assimilation.