From NATO’s eastern frontier to the energy corridors of the Baltic, the partnership between Poland and the United States has become one of the most strategically consequential alliances of the 21st century. Forged through shared values and hardened by crisis, it’s a relationship that transcends party politics in both nations and speaks to a larger truth—namely, that while alliances can lead to instability and war, as shown by the interlocking obligations before World War I, alliances, whether bilateral or multilateral, can also promote international stability by deterring conflicts, enabling collective defense, and fostering cooperation and trade among member states.
Poland proves the point. Its journey from Soviet satellite to NATO membership in 1999 and European Union accession in 2004, following a decade-long process of integration and negotiation involving extensive political, economic, and legal preparations, is a story of determination and alignment with Western democratic principles. The drive toward NATO membership was reinforced by citizen advocacy and steady diplomacy, with the Polish-American community playing a quiet but influential role in building bridges between Warsaw and Washington. The U.S. Census Bureau’s American Community Survey estimates there are nearly nine million Americans of Polish ancestry, making it one of the largest ethnic groups in the country.
From the outset, Poland understood that sovereignty in the modern era requires not only democratic governance but also a credible place within a collective security framework. Joining NATO was a strategic declaration that Poland’s future was bound to the transatlantic community. And it is precisely through NATO that the U.S.–Polish relationship contributes most visibly to international stability.
Response to Russia’s Invasion of Ukraine
When Russia launched its invasion of Ukraine in 2022, Poland responded with clarity and speed, welcoming millions of Ukrainian refugees, supplying critical military aid, and urging allies to strengthen NATO’s eastern flank. Due to its geographic location bordering Ukraine, Belarus, and the Russian exclave Kaliningrad, Poland took a proactive stance to bolster its defenses and NATO’s regional presence. Poland launched a $2.5 billion national defense initiative called the “East Shield” that was specifically aimed at strengthening the country’s roughly 418-kilometer border with Belarus and 232-kilometer border with Kaliningrad—representing some of the EU’s easternmost external boundaries—which serve as key frontlines for the bloc’s security and border control.
By shoring up NATO’s credibility and demonstrating readiness to act, Poland helped reduce the risk of wider escalation across Europe.
The U.S.–Poland defense relationship deepened accordingly. American troops are now a permanent presence on Polish soil. The U.S. Army’s V Corps forward command in Poznań, which operates from Camp Kościuszko—named for Tadeuscz Kościuszko, a national hero in both Poland and the U.S.—is responsible for coordinating and overseeing U.S. ground forces deployed in Europe. Missile defense systems such as Aegis Ashore strengthen NATO’s deterrent posture, and joint training exercises have become routine. These measures bind U.S. power to Poland’s geography, creating predictability in Europe’s most volatile region.
Poland’s overall defense spending speaks volumes. It’s approaching five percent of national GDP—more than double NATO’s longstanding benchmark of two percent of GDP for defense expenditures—and Poland’s procurement of Abrams tanks, “shoot-and-scoot” HIMARS rocket systems that are designed for rapid deployment relocation, and F-35 fighter jets ensures interoperability with U.S. forces. As U.S. Secretary of Defense Pete Hegseth put it during a February 2025 press conference in Warsaw, Poland is a “model ally on the continent, willing to invest not just in their defense, but in our shared defense and defense of the continent.”
Transcending Party Politics
The relationship transcends party politics in both capitals, having remained robust under Republican and Democratic administrations in Washington—Trump, Biden, and now Trump’s second term—as well as across successive Polish governments of differing political orientations. Polish Prime Minister Donald Tusk has reaffirmed that “Poland’s commitment to transatlantic relations and NATO must remain unquestionable,” regardless of political shifts in the U.S.
National security isn’t confined to the battlefield. Poland recognized early on that energy independence is a cornerstone of sovereignty, and it has acted decisively to cut reliance on Russian natural gas. The liquefied natural gas (LNG) terminal at Świnoujście, which is named after Polish President Lech Kaczyński, who prioritized energy security, now receives regular LNG shipments from the U.S., while the Baltic Pipe project brings natural gas from Norway and strengthens regional supply diversity. Looking ahead, nuclear energy partnerships with American firms promise long-term stability and reduced dependence on fossil fuels.
This alignment in energy policy enhances Poland’s resilience while advancing broader U.S. goals of promoting secure, market-based energy in Europe. In strategic terms, an LNG tanker docking in Świnoujście is more than commerce. It’s a visible symbol of transatlantic solidarity.
Contrasting Russian Reactions
Russia’s reaction to Poland’s NATO membership stands in striking contrast to its view of Ukraine’s Western aspirations. When Poland joined NATO in 1999, Moscow voiced strong opposition, arguing that NATO’s eastward expansion threatened Russian security. Apart from diplomatic protests and some hostile rhetoric, however, Russia ultimately conceded Poland’s accession as a fait accompli. Moscow maintained cooperative channels with NATO and Poland, even as relations were strained. Poland, with its long history of independence struggles and clear Western orientation, was not seen as part of Russia’s cultural or political sphere. Moreover, by the time Central Europe was firmly integrated into NATO, Russia had little leverage to reverse the process.
Ukraine, however, occupies a different place in Moscow’s worldview. Russia regards Ukraine not only as a strategic buffer on its border but also as central to its own identity and history. Unlike Poland, Ukraine is portrayed in Russian narratives as a “brother nation” whose alignment with the West represents a profound geopolitical and cultural loss. For this reason, Russia tolerated NATO’s enlargement to Poland and the Baltics but drew the line at Ukraine, seeing its aspirations for NATO and EU membership as a direct existential threat, responding with annexation, proxy wars, and, ultimately, full-scale invasion. The contrast underscores the strategic weight of Poland’s alliance with the United States.
For Poland, it’s a relationship rooted in hard history: the loss of independence from 1795 to 1918, when the country was partitioned among Prussia, the Hapsburg monarchy, and Russia; the devastation of Nazi occupation; the long shadow of Soviet domination; and decades of Communist rule. That experience forged a national resolve that sovereignty can never be taken for granted and must be anchored in strong alliances. Today those alliances—most of all with the United States—are essential pillars of stability in Europe.