By Sergey Sukhankin

Weakened by economic sanctions and bearing significant consequences for their geopolitical endeavors, Iran and Russia have solidified their post-2022 partnership, elevating it to the status of a comprehensive strategic partnership. The imperative to secure their borders and mitigate the impact of economic sanctions positions the South Caucasus and certain areas of the Caspian Sea as the focal points for deepening cooperation between Tehran and Moscow. Among the smaller regional actors, Azerbaijan is likely a primary beneficiary due to its geographically strategic location. Simultaneously, Russia may be inclined to reclaim some of its regional influence. This prospect is both precarious and potentially destabilizing for the region, as Russia’s historical engagement in the area has been characterized by conflict and disruptive interventions.

BACKGROUND: On January 17, Russia and Iran signed a Treaty on Comprehensive Strategic Partnership, marking the first high-level agreement between the two nations since 2001. Although historically characterized by tension and complexity, bilateral relations have undergone a significant transformation after 2022, in light of Russia’s war of aggression against Ukraine and its resulting international isolation. This period has seen a rapid elevation of Russian-Iranian ties, with some experts even suggesting the formation of an Entente.

The primary impetus behind this strengthening of relations lies in the challenges faced by both states. Politically isolated and subjected to extensive sanctions, Russia has become embroiled in a protracted and costly war. With limited strategic alternatives, Russian leadership has increasingly aligned itself with authoritarian regimes and internationally marginalized states—such as North Korea and Belarus—in an effort to mitigate the effects of its diplomatic and economic isolation and to secure critical military support.

Iran’s situation is arguably even more precarious. In addition to ongoing economic struggles and internal social unrest, Iran experienced a series of significant geopolitical setbacks between 2023 and 2024. At the end of 2024, the Tehran-backed regime of Bashar al-Assad was overthrown by the Turkish-supported opposition. Furthermore, the Israel-Hamas war inflicted severe damage on another of Iran’s key Middle Eastern proxies. These developments have reportedly exacerbated internal divisions within the Iranian political establishment, leading segments of Iran’s military-political elite to adopt a more critical stance toward Moscow.

Despite these disagreements, Russia and Iran remain compelled to act as close partners—if not outright allies—in the domains of defense and security, and perhaps even more so in trade and economic cooperation, as both seek to mitigate the detrimental effects of international sanctions. In this context, collaboration in the Caspian Sea region—particularly in specific areas of the South Caucasus—is expected to play a pivotal role in reinforcing Russo-Iranian ties.

IMPLICATIONS:  The strengthening ties between Russia and Iran are expected to have a significant impact on the geo-economic landscape. As emphasized by Russian President Vladimir Putin, "the essence of the Treaty [between Russia and Iran] is about creating additional conditions [...] for the development of trade and economic ties. We need less bureaucracy and more action." This objective is explicitly outlined in Clause 13 of the Treaty.

At present, economic and trade cooperation between Tehran and Moscow remains limited. In 2024, the reported trade volume between the two countries did not exceed US$ 4 billion. However, this may change in the future, primarily due to Russia’s evolving geopolitical strategy. Given its significantly weakened global position after 2022, Moscow increasingly views Iran as its “window to Asia”—a crucial conduit for circumventing Western-imposed economic sanctions and mitigating their severe economic impact.

In pursuit of this objective, Russo-Iranian cooperation is expected to strengthen in two key domains. First, there will likely be an intensification of trade along the International North-South Transport Corridor (INSTC)—a 7,200-kilometer multimodal freight route encompassing ship, rail, and road networks that connects India, Iran, Azerbaijan, Russia, and Central Asia. The INSTC is increasingly regarded as a viable alternative to traditional maritime trade routes such as the Suez Canal and the Bosphorus Strait.

Within this framework, Azerbaijan stands to be a primary beneficiary, as its strategic geographic position between Iran and Russia will elevate its role as a crucial transportation hub, significantly enhancing its economic and geopolitical importance within the region.

Azerbaijan’s role could be further reinforced if the two countries proceed with the construction of a natural gas pipeline through Azerbaijani territory. Initially agreed upon in 2022 and reaffirmed in late 2024, this project represents a significant expansion of regional energy cooperation. In his most recent statement on January 17, 2025, Russian President Vladimir Putin announced that the proposed pipeline would have a capacity of 55 billion cubic meters (bcm) of natural gas—equivalent to the Nord Stream 1 capacity—and could potentially be extended to Pakistan and even India.

However, some Russian experts question the economic viability of the project, arguing that its feasibility remains uncertain. They suggest that the pipeline could serve as a political instrument for Russia to exert pressure on China, possibly as a means of persuading Beijing to strengthen its energy ties with Moscow. Nevertheless, if both the International North-South Transport Corridor (INSTC) and the gas pipeline are successfully implemented, the South Caucasus—and Azerbaijan in particular—will see a marked increase in geopolitical and economic significance as a critical Eurasian transportation and energy corridor.

Although defense and security are not the primary focus of the Russo-Iranian Treaty, as explicitly stated by Iran’s Ambassador to Russia, Kazem Jalali, certain shifts in the regional security landscape are nonetheless anticipated.

One key factor influencing these dynamics is the aftermath of the Second Nagorno-Karabakh War (2020), resulting in an undisputed victory for Azerbaijan which not only received strong backing from Turkey but also enjoyed tacit Russian support. This outcome significantly weakened Iran’s position in the South Caucasus, while simultaneously bolstering its strategic adversary, Turkey. In addition to consolidating its influence over Azerbaijan, Turkey also strengthened economic, political, and energy ties with both Azerbaijan and Georgia, marking a substantial geopolitical success for Ankara and further diminishing Tehran’s leverage in the region.

However, in the post-2022 period, the geopolitical landscape of the South Caucasus has undergone further transformations, creating additional common ground for Russo-Iranian cooperation. The increasing prominence of Turkey, which directly contradicts the strategic interests of both Russia and Iran, has been a key factor in this shift.

Simultaneously, Russia’s influence over both Armenia and Azerbaijan has weakened. Armenia’s signing of a Charter on Strategic Partnership with the U.S. implies a diversification of its geopolitical partnerships, potentially reducing Moscow’s leverage in Yerevan. 

Moreover, by the end of 2024, anti-Russian sentiment became more pronounced in Abkhazia, a breakaway region that has been heavily reliant on Moscow. These developments have raised alarms among Russian analysts, some of whom have warned of Russia’s "approaching loss of the South Caucasus." While such statements may be premature and alarmist, they nonetheless reflect Moscow’s growing concerns regarding its long-term strategic foothold in the region.

Iran and Russia appear to prioritize a shared geopolitical objective: the de-Westernization of the South Caucasus and the prevention of strengthened U.S. regional influence. This strategic alignment is explicitly reflected in Clause 12 of the Russo-Iranian Treaty, which underscores both parties’ commitment to “strengthening peace and security in the Caspian Sea region, Central Asia, the South Caucasus, and the Middle East [to] prevent destabilizing interference by third parties” in these areas.

In this context, some experts suggest that Iran’s increased diplomatic involvement in regional affairs is likely. One potential avenue for such engagement is the "3+3" format, which includes Armenia, Iran, Russia, Georgia, Turkey, and Azerbaijan. Initially proposed by Ankara and Baku, the framework has since received active support from Moscow as a means to reduce the risk of Western powers gaining a foothold in the South Caucasus. Iran’s participation in this diplomatic initiative could further consolidate its regional influence while aligning with Russia’s broader strategic objectives.

CONCLUSIONS:  The expansion of Russo-Iranian ties is expected to have a notable impact on the South Caucasus and parts of the Caspian Sea region. Azerbaijan's geo-economic and geopolitical significance is likely to increase further, particularly if economic sanctions against Russia remain in place, compelling Moscow to deepen its reliance on alternative regional partners.

Russia, whose regional standing is in decline, might unexpectedly benefit from Iran’s strategic weakening. Given its growing security concerns, Tehran may become more inclined to collaborate with Moscow in the South Caucasus and the Caspian Sea region to safeguard its strategic depth and border security.

From a broader strategic perspective, a greater Russian presence in the region should be viewed as a negative development. Given the region’s complexity and history of conflict, Russia’s potential increased involvement—if it materializes—poses a significant risk. Historically, Moscow’s regional policies have regularly contributed to greater instability rather than fostering long-term security, raising concerns about the potential destabilizing consequences of renewed Russian engagement in the South Caucasus and Caspian Sea region.

AUTHOR BIO: Dr. Sergey Sukhankin is a Senior Fellow at the Jamestown Foundation and the Saratoga Foundation (both Washington DC) and a Fellow at the North American and Arctic Defence and Security Network (Canada). He teaches international business at MacEwan School of Business (Edmonton, Canada). Currently he is a postdoctoral fellow at the Canadian Maritime Security Network (CMSN).