[1] During the process of the collapse of the Soviet Union, the Soviet deputy foreign minister Yuli Kvitsinsky [ru] together with the last Soviet ambassador to Germany, Valentin Falin, formulated the Falin-Kvitsinsky doctrine which assumes that the then military influence of the Soviet Union in the territory of the Warsaw Pact countries will not be sustained against the declining economy of the USSR and should be replaced with the dependence of the countries in this area on oil and gas, since the raw materials and energy industry appeared to be the foundation in the process of rebuilding Russia's position as a superpower on the international scene.
[2][3] By the end of 1990 the Soviet leadership developed a strategy in the form of the Falin-Kvitsinsky doctrine which was aimed at the Finlandization of Central and Eastern Europe, since the doctrine accused the West of ‘ousting’ Russia from the region, in which Russia had essential strategic interests.
[4] Despite the collapse of the Soviet Union at the end of 1991, many countries of the former Warsaw Pact remained dependant on Russian supplies of energy resources.
[8] Following the 2022 Russian invasion of Ukraine, Russia has halted gas supplies to Bulgaria, Poland and Netherlands for not paying in roubles to shield the country from sanctions.
[9][10] Similarly, following Finland's application to join NATO, Russia stopped providing natural gas to the country.