Final answer:
Chechnya is the Russian state known for its violent efforts to gain independence from Russian control, with two notable wars causing extensive losses and devastation.
Step-by-step explanation:
The Russian state known for its violent riots against Russian control is Chechnya.
Chechnya has experienced significant unrest and violence in its efforts to gain independence from Russia, particularly during the chaotic aftermath of the Soviet Union's collapse. There have been two brutal wars in Chechnya, the first from 1994 to 1996 and the second from 1999 to 2009, resulting in substantial casualties and widespread destruction, leading to Grozny being called the most destroyed city on Earth at one point by the United Nations.
Chechnya's quest for independence, steeped in a turbulent history of conflict between empires, faces strong resistance from Russia due to fears of a domino effect of secession by other republics within the federation.