Romania
RO · Southeast Europe · NATO member since 2004 · EU member since 2007
Romania is NATO’s southeastern flank anchor and one of the alliance’s most strategically important members in the Black Sea region. It hosts the NATO Ballistic Missile Defence (BMD) site at Deveselu — a US Aegis Ashore facility that is among the most sensitive NATO installations in Europe — and has become the primary hub for NATO’s southeastern response to Russia’s war in Ukraine.
Romania’s Black Sea coastline gives it direct strategic relevance to the Ukraine conflict: Russian control of the northern Black Sea following the 2022 invasion has brought the conflict zone within radar and missile range of Romanian territory. Bucharest has responded by deepening military cooperation with the US, accepting additional NATO deployments, and significantly increasing its own defence spending.
Romania joined NATO in 2004 and the EU in 2007. It hosts the US Aegis Ashore BMD facility at Deveselu (operational since 2016) and Mihail Kogălniceanu Air Base near the Black Sea, which has become a major US and NATO logistics hub since 2022. Romania fully joined the Schengen Area on January 1, 2025, including land borders, following a unanimous EU Council vote in December 2024 (European Council, 2024). It is part of the Bucharest Nine (B9) eastern flank group. Romania hosts one of NATO’s largest military exercises annually.
Romania’s 2024 defence budget is approximately 2.25–2.3% of GDP in 2024 (NATO). Romania’s Ministry of Defence has requested a record 2.81% of GDP for the 2026 budget, reflecting continued upward trajectory on the eastern flank. The Romanian Armed Forces have approximately 75,000 active personnel. Romania is acquiring F-35A fighter jets (32 aircraft, government-to-government contract finalised November 2024, deliveries targeted from 2030), Patriot air defence batteries, and has the largest standing army in Central-Eastern Europe after Poland.
Romania’s strategic importance has grown significantly since 2022. Mihail Kogălniceanu has been expanded to accommodate US troops and serves as a transit point for NATO reinforcements to the eastern flank. Romania also hosts the NATO Black Sea security coordination mission and has expanded naval cooperation in the Black Sea region.
Black Sea security: Russia’s dominance of the northern Black Sea following the 2022 invasion brings the conflict zone to Romania’s doorstep. Romanian waters have been affected by floating mines, and Russian drone debris has been found in Romanian territory on multiple occasions — each incident raising questions about Article 5 applicability.
Moldova: Romania has a special relationship with Moldova, sharing language (Romanian/Moldovan are mutually intelligible), history, and significant ethnic overlap. Romania provides Moldova with EU candidacy support, energy assistance, and accepts Romanian citizenship applications from Moldovans. Russia’s war in Ukraine has made Moldovan security a direct Romanian concern.
Aegis Ashore and Russia: The Deveselu BMD facility is one of Russia’s most persistent complaints about NATO posture in Eastern Europe. Russia claims it undermines strategic stability; NATO and the US maintain it is purely defensive against Iranian ballistic missile threats.
Domestic rule of law: Romania has faced EU scrutiny over corruption and judicial independence for years. Progress has been made but concerns remain, complicating its Schengen land border accession timeline.
Romania illustrates the concept of “strategic geography” in IR — the idea that a state’s physical location in the international system determines its strategic importance independent of its economic or military power. Romania’s Black Sea coast and proximity to the Ukraine conflict have made it far more strategically significant post-2022 than its GDP or military budget alone would suggest. The Deveselu BMD debate is also a key case study in how defensive capabilities can create offensive concerns (security dilemma dynamics) and how states use technical arguments about weapons systems to make geopolitical points.