In 1870, the state of tennessee adopted a new constitution. which is the best explanation for why this happened?

The best explanation to adopt a new Constitution in Tennessee is that it was a response to the requirement for all ex-Confederate states to adopt new constitutions expressly prohibiting slavery. In that sense, General Assembly, on November 15, 1869, called for an election to determine if a constitutional convention should be called to amend or replace the 1835 Constitution and to elect delegates to that convention. Finally, the voters decided for the convention and the new Constitution was approved in March 1870.

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.