Analytical Brief

Institute of Danube Research, September 2026

On 18–19 September 2026, Ukraine hosted the inaugural summit of the Carpathian Integration Initiative, also known as C8, or the Carpathian Eight. The political segment began in Huta, in the Ivano-Frankivsk region, while the economic forum took place in Bukovel. The format brought together Ukraine, Poland, Romania, Slovakia, Hungary, Czechia, Austria and Serbia. Heads of state and government, representatives of the EU, regions, local communities and businesses participated in the events at various levels.

The summit has already produced some practical results. According to Reuters, more than 50 agreements worth over €1 billion were concluded during the event, a substantial share of them concerning renewable energy. Ukraine also presented a portfolio of transport and infrastructure projects for public–private partnerships.

The question, therefore, is not whether Ukraine “needs” the Carpathian Initiative. For border regions, cross-border infrastructure, energy, tourism, environmental protection and access to EU funding, this format has a clearly defined functional scope.

A different question is far more important: can the Carpathian format become the principal geopolitical and geoeconomic framework for Ukraine’s positioning?

This is precisely where subregional policy must be distinguished from national geostrategy.

Ukraine Is a Carpathian Country, but Not Only a Carpathian Country

Ukraine is a fully recognised Carpathian state under international law. Together with Poland, Romania, Slovakia, Czechia, Hungary and Serbia, it is a party to the Carpathian Convention, signed in Kyiv in 2003. Ukraine is preparing to assume the Presidency of the Convention at the end of 2026.

However, the geographical significance of the Carpathians varies considerably from country to country. According to one widely used estimate of the mountain system’s spatial distribution, more than half of the Carpathians lie in Romania, around 17% in Slovakia and approximately 10% in Ukraine. The precise shares depend on the methodology used to delineate the Carpathian region, but the overall relationship is clear: for Ukraine, the Carpathians are important, yet they constitute only one of several major geographical spaces.

This is why the Carpathian Initiative makes sense as a macroregional mechanism, while its suitability as a framework for Ukraine’s entire geoeconomy is far less evident.

Ukraine belongs simultaneously to the Carpathian, Danube, Black Sea, Baltic–Black Sea and Eastern European spaces. Its future transport geography may increasingly encompass the Caucasus, the Caspian region and Central Asia as well.

In the twenty-first century, the viability of regional arrangements depends to a considerable extent not on symbolic geography, but on whether real flows of capital, energy, goods, technology and people pass through them.

In this sense, an acronym alone determines very little.

MINT—Mexico, Indonesia, Nigeria and Turkey—is an instructive example. This grouping is sometimes mistakenly compared with international political blocs. In reality, MINT emerged as an investment and analytical acronym for a group of promising economies, rather than as an intergovernmental organisation.

The Carpathian Eight has a fundamentally different origin: it is already a political initiative among states. Nevertheless, it faces the same fundamental challenge as any new regional format: turning a geographical designation into infrastructure and economic activity.

The initiative remains at precisely this initial stage.

Its declaration envisages the development of cross-border cooperation, transport and energy connectivity, distributed generation, energy storage, infrastructure, civil protection systems and interregional partnerships. It is therefore more of a coordination platform than an established economic bloc with a common market, a budget, permanent institutions or a transport system of its own.

Even the level of political representation at the first summit indicates that institutionalisation is only beginning: not all eight states were represented at the highest level, and the published declaration explicitly names six participating countries—Austria, Poland, Romania, Serbia, Slovakia and Ukraine.

Why the Black Sea and the Danube Matter as Much to Ukraine as the Carpathians

Viewed through the lens of economic flows, Ukraine’s geopolitical map is considerably broader.

Since 2022, transport connectivity has become one of the key components of the country’s economic resilience. The European Solidarity Lanes, comprising road, rail and inland waterway routes, have already enabled the movement of hundreds of millions of tonnes of Ukrainian goods. The European Commission estimates the total value of trade through these routes at approximately €304 billion since their establishment.

Within this system, the Lower Danube forms a distinct area encompassing Reni, Izmail, Giurgiulești, Galați and Constanța. The Danube Commission explicitly identifies this complex as the Danube Solidarity Lane for trade between Ukraine and Europe.

This is where a structural limitation of C8 becomes apparent.

Moldova and Bulgaria are not members of the Carpathian Eight. Yet it is difficult to envisage a comprehensive architecture for Ukraine’s access to the Lower Danube, the Balkans, the Aegean region and south-eastern energy routes without them.

Consider the Vertical Gas Corridor. Following its expansion in September 2026, it brings together operators from Greece, Bulgaria, Romania, Hungary, Slovakia, Ukraine, Moldova, Serbia and North Macedonia. It is already a practical north–south energy system extending from South-Eastern Europe to Ukraine.

This offers a very important lesson.

Economic geography itself shapes coalitions of states, often independently of the names given to political regional formats.

From the Carpathians to the Caspian

An even larger transformation is taking place along the east–west axis.

The European Union increasingly views the Black Sea not as Europe’s periphery, but as a gateway to the South Caucasus and Central Asia. The new EU Strategy for the Black Sea explicitly envisages a Connectivity Agenda intended to link Europe with Central Asia through the Black Sea and the South Caucasus.

In June 2026, the European Commission launched the corresponding Connectivity Agenda Platform. Together with international financial institutions, it announced mechanisms capable of mobilising up to €2 billion in investment in strategic transport, energy and other infrastructure in the Black Sea region and the South Caucasus. Participants in the process include Ukraine, Moldova, Armenia, Kazakhstan, Turkmenistan, Central Asian states and other partners.

This approaches a model that might provisionally be termed a “two-sea” framework, connecting the Black Sea and Caspian spaces.

Its transport backbone could be the Trans-Caspian, or Middle, Corridor. The World Bank estimates that, with the necessary investment and reforms, trade volumes along this route could potentially triple by 2030, while transport times could be reduced by approximately half.

This opens up a much broader geoeconomic perspective for Ukraine.

Along the east–west axis lie Central Asia, the Caspian, the South Caucasus, the Black Sea and EU markets.

Along the north–south axis lie the Baltic region, Poland and Ukraine, the Danube, the Balkans, the Aegean and the Eastern Mediterranean.

The intersection of these corridors could transform Ukraine from an endpoint of transport routes into a crossroads state.

This logic could underpin a broader “Five Seas” concept—not as another political bloc with a new acronym, but as a system connecting the Caspian, Black Sea, Baltic, Adriatic and Mediterranean spaces.

For now, this remains an analytical concept rather than an established international organisation. Crucially, however, its transport and energy logic is already substantially reflected in actual EU programmes.

Is C8 a New Visegrád Group?

The comparison arises naturally, but it has its limits.

The Visegrád Group has brought together Poland, Czechia, Slovakia and Hungary since 1991. All four states are now members of the EU and NATO, and decades of cooperation have created an institutional tradition around V4, together with the International Visegrad Fund and its standing budget.

C8 is considerably more heterogeneous: it includes EU and non-EU countries, NATO members and militarily non-aligned Serbia, large and small economies, and countries in which the Carpathians play very different roles in the territorial structure.

At this stage, it is therefore more accurate to describe C8 as an attempt to create a broader platform for Carpathian macroregional cooperation than as a “new Visegrád Group”.

C8 may find its own niche precisely where a genuine common denominator already exists: cross-border roads and railways, energy networks, environmental policy, mountain areas, tourism, civil protection, local self-government and European territorial cooperation programmes.

The internal balance of the new format deserves particular attention.

Poland will naturally carry considerable structural weight because of the scale of its economy, its EU and NATO membership, its shared border with Ukraine and its role in overland logistics. Nevertheless, it would be premature to conclude that any single state already dominates C8.

Romania has substantial weight of its own: it is the largest Carpathian country in terms of the area occupied by the mountain system, a Black Sea state, an EU and NATO member, and a key partner for Ukraine on the Lower Danube.

The actual balance within C8 will therefore be determined not by its geographical name, but by the infrastructure projects, financial mechanisms and permanent institutions that emerge within the format.

Multiplying Centres of Connectivity Rather Than Relocating Ukraine’s Centre

Holding a major international event in western Ukraine does not, in itself, imply shifting the country’s geopolitical centre westward.

A problem would arise only if the Carpathian dimension began to be treated as a self-sufficient model for the entire country’s external economic positioning.

For a country of Ukraine’s scale, a different spatial logic is more productive: several interconnected geoeconomic gateways, rather than a single centre and a single macroregion.

The Carpathians provide access to Central Europe.

The Danube provides access to Central and South-Eastern Europe.

The Black Sea provides access to the Caucasus, Turkey and global maritime routes.

The South Caucasus and the Caspian provide access to Central Asia and the Middle Corridor.

The Baltic–Black Sea axis provides access to Poland, the Baltic states and Scandinavia.

Combining these directions, rather than setting them in competition, creates the greatest scope for Ukraine’s geoeconomy.

Concluding Perspective: The Carpathians as Part of a Larger System

From the perspective of the Institute of Danube Research, the Carpathian Integration Initiative should be analysed primarily as one of the macroregional dimensions of Ukraine’s future European integration.

Its practical potential lies in cross-border infrastructure, energy, local community development, the protection of the Carpathians, tourism, investment projects and access to the instruments of European cohesion policy.

However, Ukraine’s economic geography extends far beyond the Carpathians.

The experience of the Danube Corridor, transport connectivity among Ukraine, Moldova and Romania, the expansion of the Vertical Gas Corridor, the development of Black Sea logistics and the EU’s new policy for connecting Europe with the South Caucasus and Central Asia point to a different, broader trend: Ukraine is gradually finding itself at the intersection of several transport and energy macroregions simultaneously.

This may be the key geoeconomic formula.

Do not confine Ukraine to the Carpathians.

Do not set the Carpathians against the Danube or the Black Sea.

Instead, integrate the Carpathian space into a much larger system: the Baltic–Carpathians–Danube–Black Sea–Caucasus–Caspian–Central Asia, complemented by a southern outlet through the Balkans to the Aegean and Mediterranean seas.

C8 would then cease to be an attempt to establish yet another regional “club” and become one of the nodes in Ukraine’s broader network-based geopolitics.

For a country whose geography allows it to belong simultaneously to Central Europe, the Danube region and the Wider Black Sea region, connectivity among macroregions, rather than confinement within any one of them, is the central subject of strategic planning.