Terrorism in Russia has historical roots dating back to the 19th century with revolutionary terrorist organizations and continued with Bolsheviks using terrorism against political opponents. During the 1990s, terrorism increased amid the collapse of the USSR and rise of Islamic and radical right-wing groups. Chechnya declared independence in 1991 but Russian military intervention during 1994-1996 and 1999-2009 wars sought to reestablish control. Present-day Chechnya has greater autonomy under its president but contradictions remain between local Islamic laws and the Russian constitution, and corruption and security issues continue to undermine stability in the region.