Relations between the United States and Romania acquired a qualitatively new character following the collapse of the socialist bloc at the turn of the 1980s–1990s. A significant step toward rapprochement between the two countries was Romania’s accession to NATO in March 2004. Since then, the country has been regarded by the White House as one of the key outposts on the eastern flank of the North Atlantic Alliance.
The security dimension of U.S.–Romanian relations gained renewed momentum as a result of the full-scale war launched by the Russian Federation against Ukraine in 2022. Sharing a border with Ukraine, having access to the Black Sea, and hosting U.S. military bases on its territory, Bucharest has transformed into an important logistical, humanitarian, and military hub for supporting Kyiv by the United States and its allies. As noted by the U.S. Congressional Research Service, “U.S.–Romanian cooperation encompasses joint exercises, U.S. access to military facilities in Romania, and rotational troop deployments on Romanian territory” [4].
Notably, in order to reinforce NATO’s eastern flank, the United States began redeploying additional troops to its bases in Romania in February 2022, even prior to the commencement of Russia’s full-scale invasion of Ukraine. By 2023, the U.S. had increased its military contingent in the country by approximately 3,000 personnel [2]. Thus, the Russian invasion of Ukraine has effectively elevated Romania to one of the most strategically important countries in Eastern Europe for the United States.
It is important to emphasize that the decision of U.S. leadership to designate Romania as a key partner in the Black Sea region is not accidental. Bucharest has been actively developing its military infrastructure and continuously modernizing its defense sector. The country hosts a missile defense base that forms part of NATO’s missile defense shield. At the same time, security cooperation with the United States plays a vital role for Bucharest. Against the background of increasing military activity in the Black Sea region, Romania’s political and military leadership has repeatedly stressed the strategic importance of reinforcing NATO’s eastern flank. In this context, the expanded U.S. military presence in Romania has become a significant factor in strengthening regional deterrence and defense capabilities [1]. Romania has also intensified military training activities on its territory and expanded its defense procurement programs, with the United States remaining one of its principal arms suppliers. A notable example of this cooperation was the “Sea Breeze 2023” military exercise, conducted under Romanian and U.S. leadership in the Black Sea region.
It is important to note that the deepening of cooperation between Washington and Bucharest in the context of the escalation of the Russo–Ukrainian conflict has been accompanied not only by increased military and political engagement, but also by the emergence of new challenges. In October 2025, the United States announced a partial withdrawal of its military personnel from an air base located in Romania. This decision generated concern among Romanian authorities, particularly in light of the intensification of Russian military actions against Ukraine and the growing transformation of the Black Sea into an active theater of operations.
Concurrently, within the broader context of the ongoing military campaign against Iran, the administration of D. Trump decided in March 2026 to reinforce the U.S. military presence in Romania through the deployment of additional forces and equipment. This decision generated internal political debate, as several Romanian parliamentarians voiced concerns that such measures might heighten the risk of the country’s indirect involvement in a potential armed confrontation with Iran. Nevertheless, the parliamentary vote ultimately demonstrated that the consolidation of strategic partnership with the United States was prioritized over the possible adverse implications for Romanian–Iranian relations.
Within the broader framework of U.S.–Romanian security relations, energy security has emerged as a key area of cooperation. Over recent years, bilateral engagement has deepened across several domains, including civilian nuclear energy, cybersecurity, and infrastructure modernization. For the United States, this partnership is strategically significant not only in terms of mitigating Russian influence in the region, but also in securing leverage over a critical infrastructural nexus connecting the Black Sea, Central Europe, and the Balkans [3]. Romania’s substantial proven natural gas reserves—among the largest in the region—further contribute to its strategic relevance. These interests are reciprocated by Bucharest, which, against the backdrop of evolving security dynamics in the Black Sea region, views enhanced cooperation with Washington as an essential mechanism for ensuring the secure production and transportation of hydrocarbon resources.
In conclusion, U.S.–Romanian security cooperation represents a mutually advantageous partnership shaped by evolving regional security dynamics. The escalation of the Russo–Ukrainian war has served as a primary catalyst for its intensification, highlighting both the immediate threats facing Romania and the broader risk of regional destabilization. For the United States, Romania functions as an important strategic foothold for advancing its security objectives in the Black Sea region. Conversely, for Bucharest, this partnership is perceived as a fundamental pillar ensuring national sovereignty and long-term security.
References
1. Current Trends in Romania’s Foreign Policy and National Security [In Ukrainian] / National Institute for Strategic Studies. March 20, 2024. Available at: https://cutt.ly/ZtVHFrtH (accessed May 15, 2026).
2. Babb, C. How U.S. Troops in Romania Are Holding NATO’s Line of Defense. [In Ukrainian] Voice of America. February 7, 2023. Available at: https://cutt.ly/FtVHFFij (accessed May 15, 2026).
3. New EU Strategy for a Secure, Prosperous and Resilient Black Sea Region / European Commission. May 28, 2025. Available at: https://cutt.ly/NtVHF5jm (accessed May 15, 2026).
4. Romania: Background and U.S. Relations / Congressional Research Service. February 28, 2025. Available at: https://cutt.ly/DtVHGpA8 (accessed May 15, 2026).
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