US secures multi-billion-dollar energy and AI deals at Three Seas summit in Dubrovnik

A struggle for influence is intensifying between the European Union and the United States in Central, Eastern and South-Eastern Europe, with the “Three Seas Initiative” (3SI) emerging as a primary arena for this geopolitical contest.

An analysis published by German Foreign Policy reveals that Western European nations and the EU are increasingly positioning renewable energy as a strategic counterweight to US liquefied natural gas (LNG) deliveries in the region.

At a 3SI summit convened in late April in the Croatian coastal city of Dubrovnik, representatives from the Trump administration met with officials from the 13 EU member states that comprise the initiative. The parties agreed on a series of new projects spanning energy supply, pipelines, artificial intelligence (AI), and digital infrastructure.

The immediate focus of these talks centred on new natural gas interconnectors for South-Eastern Europe and a massive AI project in Croatia carrying an estimated investment volume of €50 billion.

Originally established to modernise and expand infrastructure between the Baltic, Adriatic and Black Seas, the initiative has increasingly transformed into a vehicle for American power projection in Eastern and South-Eastern Europe.

Energy policy remains the critical battleground: whilst the Trump administration seeks to lock in long-term US LNG export markets, the EU is pushing to pivot the region towards renewable energy. Notably, investments targeting renewable energy systems were also approved during the Dubrovnik proceedings.

A brief history of the Three Seas Initiative

The Three Seas Initiative was launched in 2015 by Polish President Andrzej Duda and Croatian President Kolinda Grabar-Kitarović, holding its inaugural summit in Dubrovnik in August 2016. The platform comprises 13 EU member states stretching from the Baltic nations (Estonia, Latvia and Lithuania) through the Visegrád Group (Poland, Hungary, the Czech Republic and Slovakia) and Austria, down to Croatia, Romania, Bulgaria and Greece.

Albania, Montenegro, Ukraine and Moldova have subsequently associated themselves with the platform.

The initiative derives its name from its geographical objective: linking the Baltic, Adriatic and Black Seas through the territory of its member countries.

The creation of the 3SI was heavily driven by the United States. US strategists drew direct inspiration from an interwar Polish foreign policy concept formulated by Marshal Józef Piłsudski. Piłsudski’s “Intermarium” plan sought to unite Eastern European nations—spanning from the Baltic states to Yugoslavia and Romania—into a geopolitical bloc designed to act as an anti-Soviet bulwark.

In late 2014, the US think tank the Atlantic Council, collaborating with Central Europe Energy Partners (CEEP)—a lobby group representing energy companies in Poland, Lithuania and Romania—published an influential analysis. The report focused on developing a “North-South Corridor” extending from the Baltic Sea to the Adriatic and Black Seas.

The founding documents of the Three Seas Initiative explicitly reference this American strategic blueprint.

Washington has spent years utilising the 3SI to consolidate and expand its influence over the participant states. The cornerstone of this strategy is energy policy, specifically aimed at substituting imports of Russian pipeline gas with US-sourced LNG.

A North-South corridor to bypass the East-West axis

To achieve this geopolitical shift, the Three Seas Initiative seeks to expand the infrastructure of Eastern and South-Eastern Europe by adding robust north-south transport and energy links. Since 1990, infrastructural development in the region had run predominantly on an east-west axis, prioritising integration with Germany at the heart of the EU.

Constructing a north-south network will not only facilitate the distribution of US LNG imported via Adriatic and Baltic ports, but also foster a more autonomous regional infrastructure. By reducing reliance on road and rail networks terminates in Germany, the project threatens a significant dilution of Berlin’s economic and political leverage in the region.

Following the EU’s commitment to phase out Russian gas imports entirely by 2027, the strategic weight of LNG terminals and their corresponding north-south pipelines has steadily grown.

This structural dependency is visible within Germany itself. According to the Federal Ministry for Economic Affairs and Climate Action, approximately 96% of the LNG imported via German North Sea and Baltic terminals in 2025 originated from the US. This US supply accounts for 10.3% of Germany’s total gas imports.

German-American friction in South-Eastern Europe

The struggle for influence in Eastern Europe, and the decisive role of energy transit within it, was recently illustrated by a leadership crisis in Bosnia and Herzegovina surrounding the German diplomat Christian Schmidt, the international community’s High Representative.

Schmidt’s eventual resignation was precipitated by intense political maneuvering between certain Western European nations—led by Germany—and the Trump administration, which has been actively pursuing gas and raw material agreements in Bosnia and Herzegovina.

Having successfully pressured Schmidt to step down, the US proposed Italian diplomat Antonio Zanardi Landi as his successor. The nomination served to drive a wedge between EU member states, with Germany opposing Washington’s preferred candidate whilst Italy offered its support. President Trump warned that Washington would halt financial assistance to Bosnia and Herzegovina if the US plans were thwarted.

The move aligns with a new US strategy for South-Eastern Europe submitted by the Trump administration to Congress in May. The updated policy pivots away from “democracy promotion,” focusing instead on security and securing market access for American corporations.

Historically, Bosnia and Herzegovina has relied on Russian natural gas delivered via the TurkStream pipeline. Washington aims to replace this supply with US LNG imported through a terminal on the Croatian island of Krk.

The proposed infrastructure plans involve constructing a new pipeline extension into Bosnia and Herzegovina, to be built by US engineering firm Bechtel alongside AAFS Infrastructure and Energy. Schmidt had increasingly been viewed by US officials as an obstacle to these plans.

A victory for the Trump administration at the 3SI summit

In late April, Dubrovnik hosted the 10th anniversary summit of the 3SI alongside an aligned Business Forum. The event drew high-level participation, including seven presidents and prime ministers from 3SI member states, numerous cabinet ministers, and senior representatives from the Trump administration.

At the forum, the US successfully leveraged multi-billion-dollar energy and technology projects to entrench its footprint in South-Eastern Europe.

US Secretary of Energy Chris Wright declared in Dubrovnik: “The United States is ushering in a new era of cooperation for Central and Eastern Europe. This partnership is built on our mutual support for an aggressive energy expansion agenda.”

To formalise this initiative, Wright, Croatian Prime Minister Andrej Plenković and the Chairwoman of the Council of Ministers of Bosnia and Herzegovina, Borjana Krišto, signed a memorandum of understanding to launch the “Trump Peace Pipelines Framework”.

The agreement directly advances the “Southern Interconnection” project, which will link Bosnia and Herzegovina’s gas grid to the Croatian network and the Krk island LNG terminal.

At the summit, Polish Climate and Environment Minister Miłosz Motyka also emphasized the region’s commitment to expanding nuclear energy, calling it the “cornerstone of our new security architecture.”

Parallel to these energy agreements, American investors announced plans to build a massive AI and data centre hub in Croatia. The Pantheon Atlas investment group signed a memorandum of understanding with the Croatian firm Končar Group to construct an AI campus.

The total investment is projected at approximately €50 billion—a sum exceeding half of Croatia’s annual gross domestic product (GDP).

The gigawatt-scale power capacity required to run the data centre is comparable to the electricity demand of a major metropolitan area like Zagreb. To meet its current power requirements, Croatia relies heavily on natural gas, much of which is imported through the Krk LNG terminal.

Foreign policy implications of the energy transition

The Dubrovnik summit also marked the establishment of a new regional infrastructure fund. The vehicle is designed to finance joint investments in hydrogen production, cross-border transport infrastructure, renewable energy systems and electrical grid expansion, with at least €2 billion earmarked for initial projects.

By comparison, more than €4 billion was invested in natural gas infrastructure within the region between 2016 and 2025.

This gradual shift toward renewable energy introduces a distinct foreign policy dynamic. While LNG supplies are overwhelmingly dominated by imports from the US, the hardware and technology required to deploy renewable energy infrastructure do not carry the same transatlantic dependency. In the vast majority of cases, this technology is manufactured and supplied from within Europe itself.