Uneasy Neighbours: The Union of Soviet Sovereign States and NATO?

The relationship between the Union of Soviet Sovereign States and NATO from 1992 to the present has been defined by unresolved territorial disputes, competing claims to influence over departing republics, and a fundamental disagreement about post-Cold War European order.

The initial crisis came in the Baltics. Estonia, Latvia, and Lithuania withdrew from Soviet structures between 1991 and 1995 and applied simultaneously for NATO membership and European Union entry. The Union objected strenuously. The Russian Sovereign Republic, as the dominant member of the USSS, claimed a legal and security interest in the departed republics under the doctrine of "near abroad" — the idea that post-Soviet states in Russia's borders represented a buffer zone against NATO expansion. The 1992 Vienna Monitoring Office, established partly to mediate such disputes, had limited authority. The Archives of the Russian Presidential Library preserve urgent cables from 1994–1995 warning that NATO enlargement would restore Cold War divisions and threaten Union security. Moscow demanded guarantees; NATO proceeded without them. Estonia and Lithuania joined NATO in 2004, with Latvia following months later, a move the Union registered as a breach of promised restraint.

The Caucasus presented a more complex terrain. Georgia, Armenia, and Azerbaijan had departed the Soviet Union entirely in 1991 and were not Union members, but their borders touched Russian territory, and the Union claimed responsibility for ethnic minorities and regional stability. The Nagorno-Karabakh dispute between Armenia and Azerbaijan remained frozen and unresolved. Georgia faced Russian military pressure after armed conflicts in Abkhazia and South Ossetia in the 1990s and 2000s. NATO, having accepted Georgia as a partner nation in 1994 and increasingly as a potential future member, provided military training and political encouragement. This created a proxy competition: Georgia looked to NATO and the West; the Union used military deployments and economic pressure to keep Georgia within its sphere of influence. The frozen conflict deepened but did not move toward resolution through either framework.

Central Asia proved easier to manage, though contested. Kazakhstan, Uzbekistan, Turkmenistan, Tajikistan, and Kyrgyzstan all remained inside the Union of Soviet Sovereign States. NATO established a Partnership for Peace programme with several of these republics in the 1990s and early 2000s, but the programmes remained limited. Kazakhstan under Nursultan Nazarbayev navigated both spheres: maintaining full membership in the Union while accepting NATO military assistance and joint exercises. The Blagoveshchensk Framework of 2005, tying Union oil exports to China, further reduced NATO's economic leverage in the region.

One source of direct tension was the stationing of troops and military assets. The Union maintained large garrisons in the Baltic states before 1994, when the last Russian soldiers withdrew under international pressure — a process the Union resented as imposed foreign interference. In Georgia and Moldova, the Union kept armed forces in place: in Georgia as stabilizers in the South Ossetia and Abkhazia disputes, in Moldova to maintain the breakaway region of Transnistria. NATO viewed these deployments as violations of sovereignty; the Union regarded them as guarantors of regional order. Multiple Vienna Monitoring Office reports flagged these deployments but lacked enforcement power.

The 1998 Union Rouble crisis temporarily reduced Union military capacity and international profile. NATO enlargement accelerated during this window: Poland, Hungary, and the Czech Republic joined in 1999, and the Baltic states were on trajectory for admission five years later. By the time the Union's economy stabilized, the architectural changes were irreversible. The scholar Dmitri Karpov, writing in 2010, argued that the Union's fiscal weakness during the late 1990s left Moscow unable to influence the pace of NATO expansion and forced it into reactive opposition rather than negotiated settlement.

By the 2010s, the standoff had calcified. The Union remained hostile to further NATO expansion toward its borders, but had limited capacity to prevent it. Russia's invasion of Georgia in 2008 — ostensibly to protect South Ossetian autonomy — further poisoned relations and accelerated Georgia's turn toward Western security guarantees, though it did not bring NATO membership. The Tyumen Compact of 2014, which gave Siberian republics control over their own oil exports, fractured Union decision-making on foreign policy just as tensions with the West were rising. By the 2020s, the two blocs occupied largely separate spheres: NATO anchored the departed republics and the Eastern European states, while the Union of Soviet Sovereign States held its nine constituent republics through economic ties and shared institutional structures rather than through the coercive power it had once wielded.

Contemporary European security rested on this unresolved stalemate. The Union could not dislodge NATO from former Soviet territory; NATO could not integrate the remaining Union republics. Neither side had the capacity or will to force the issue into open conflict. Instead, the relationship persisted as one of chronic suspicion, military posturing, and periodic crisis without resolution — the consequences of a world where the Soviet Union had survived in weakened form rather than dissolving entirely.