Soviet Union The Union of Soviet Socialist Republics ( U . S . S . R . ) , commonly known as the Soviet Union was a communist country which existed in Eastern Europe and Asia before the Great War . Background . Consisting of 15 Soviet republics : Armenia , Azerbaijan , Belarus , Estonia , Georgia , Kazakhstan , Kyrgyzstan , Latvia , Lithuania , Moldova , Russia , Tajikistan , Turkmenistan , Ukraine , and Uzbekistan . The country fought on the side of the Allies in World War II . The Soviets also offered assistance to Mao Zedong ' s communist regime in China until the mid - 1950s , when ideological disputes lead to a breakdown of relations between the two powers . The Sino - Soviet split was caused primarily by a debate over ideological orthodoxy and the nations ’ differing interpretations of Marxist - Leninist doctrine , both which had shifted to support their own national interests . Lead by Premier Nikita Khrushchev , the Soviet Union had begun adopting policies which favored a more peaceful coexistence and open relations with the west , while the Chinese regime remained staunchly Stalinist , a school of thought promoting national and ideological protectionism and intense mistrust of any non - communist government . Chinese leadership saw the softening of Soviet communism and relative warming of Soviet - western relations as nothing short of blasphemy against their Marxist ideals and came to view the Soviets with almost as much distrust as the nations of the west . The tension may have been exacerbated by disputes over territories such as the Soviet puppet state of Mongolia as well as Soviet land along the Amur and Argun rivers , all of which the Chinese claimed as rightfully theirs . This divide in the communist world was viewed primarily with jubilation among capitalist powers , who saw their two main opponents become one another ’ s enemies almost overnight . As part of the response to this split , the nations of the west largely welcomed the change in relations with the USSR , adopting a less aggressive stance toward the Soviets ’ new , somewhat softer form of communism ( this is a point of divergence from our own universe , in which all three parties simply remained mutually hostile ) . The radical Chinese were pushed further away from both eastern and western spheres , eventually allowing them to take the stage as the prime advocate of communism worldwide and become the main antagonist of the cold war . Due to divergence in the " Fallout " universe , the USSR did not dissolve in 1991 and continued to exist well into the 21st century , theoretically up until the Great War . While the exact reasons for the USSR ’ s survival are unconfirmed , certain factors can be presumed to have played a large role ; the relative warming of relations between east and west would have allowed the US - Soviet arms race to subside at least partially , putting less of a strain on the Soviet economy . This would have lessened , at least to some extent , the intense poverty which was so prevalent in the USSR and in our timeline lead to widespread dissolution with the Communist Party ’ s system of economic governance . Additionally , the Fallout universe ’ s hallmark absence of information technology would have lessened the influence of western media and culture which in our timeline was so ubiquitous in the later years of the USSR and ultimately lead to its downfall through lack of popular support for the ruling party . The difference in history between universes leaves many of the USSR ’ s affairs between World War II and the Resource Wars ( a period of almost 100 years ) a mystery , or at least unconfirmed within Fallout Canon . The Soviet Union is known to have had a consular service and foreign service and even maintained strong consular relations with the United States . There was a Soviet consulate in Los Angeles ( which Natalia ' s grandfather worked at ) , suggesting that Soviet - American relations were good enough in 2077 that American and Soviet citizens were able to visit each other ' s countries . However , there is evidence that the USSR was still considered at odds with the west , and was at the very least suspected of espionage by a part of the American populace . During the Resource Wars , the Soviet Union was in no direct conflict with the United States , with l real evidence suggesting it played much of a role in the international situation at all . The USSR had access to sufficient reserves of petroleum and uranium ( particularly within the Caucasus region and the central steppes , as well as in the satellite state of Romania ) , and likely pursued policies of isolationism and economic protectionism , consolidating its energy sources and weathering the storm of shortages on its own , consigned not to invade other nations so long as it was not invaded itself . It is unknown what role the USSR played in the Great War as it considered both sides of the war far from its allies . The Soviets and Chinese re ained hostile throughout the 2100s , and there was always deep distrust between the US and USSR , as had been the status quo between communist and capitalist nations for over a century . The possibility of a war between the eastern and western powers was still present in the minds of the people , and considered by some to be a real threat . There is no evidence suggesting Soviet support for either side of the Sino - American War , although they were doubtlessly drawn into the subsequent thermonuclear exchange as it involved every major world power . Given the international situation it is likely that , in the final hours of modern civilization , the Soviets found themselves pitted not only against China or the western powers , but in a mutual destruction scenario with both factions at once . The reason for China ’ s status as the primary communist power and enemy of the west in the Fallout universe is not canonically stated , but a connection can be assumed to the Sino - Soviet Split and subsequent improvement of Soviet - Western relations – the latter of which is necessary to explain the survival of the USSR and Warsaw Pact and therefore maintain the cold war culture and feel central to the Fallout world .