Which part of the russian federation has fought bitterly for its independence?

The Russian republic was established immediately after the Russian Revolution of 1917 and became a union republic in 1922. ... In 1991, following the dissolution of the Soviet Union, Russia joined with several other former Soviet republics to form a loose coalition, the Commonwealth of Independent States (CIS).

From 1994 to 1996, Russia fought Chechen guerillas in a conflict that became known as the First Chechen War. Tens of thousands of civilians died, but Russia failed to win control of Chechnya's mountainous terrain, giving Chechnya de facto independence. Chechen victory Khasav-Yurt Accord Russia–Chechen Peace Treaty Withdrawal of Russian federal troops from Chechnya by the end of December 1996