Europe's Defense Shift: From the 5 Percent Target to Strategic Autonomy

The European security architecture is in the midst of a historic transformation in February 2026. With the new spending target of 5 percent of gross domestic product by 2035, decided at the NATO summit in The Hague in June 2025, the transatlantic alliance has made an unprecedented fiscal adjustment. This target, divided into 3.5 percent for traditional defense capabilities and 1.5 percent for expanded security areas such as cybersecurity, supply chain resilience, and critical infrastructure, marks a paradigm shift in European defense policy.

The strategic realignment occurs against the backdrop of a rapidly deteriorating security situation on the European periphery. Russia increased its defense spending in 2025 to $186 billion, which corresponds to 7.3 percent of its GDP – an increase from 6.7 percent the previous year. This massive militarization of the Russian economy, combined with ongoing aggression towards Ukraine and hybrid threats against NATO member states, has forced Europe to fundamentally reassess its defense posture.

Poland has established itself as a leader in European rearmament. With an estimated 4.5 percent of GDP for defense in 2025, Warsaw not only leads the NATO spending statistics but also allocates about 54 percent of these funds to the procurement of weapon systems – the highest share within the alliance. The country now has the third-largest army in NATO and plans further expansions. These investments reflect the pronounced threat awareness of Polish society, shaped by the immediate geographical proximity to Russia and the country's historical experiences.

Germany took a significant step towards a technology-based defense strategy last week. On February 25, 2026, the Bundestag approved the procurement of kamikaze drones worth 540 million euros from the German startups Helsing and Stark Defense. These systems are intended to equip the German armored brigade in Lithuania by 2027, thereby strengthening NATO's eastern flank. Although the originally planned procurement budget of four billion euros was reduced, this decision signals a strategic shift in German defense policy: the prioritization of autonomous systems and the deliberate promotion of the domestic defense industry.

This focus on European manufacturers is no coincidence. While Europe absorbed 35 percent of U.S. arms exports during the period 2020-2024 and the arms imports of European NATO members more than doubled compared to the previous four years, there is now a clear trend towards strategic autonomy. The Pentagon leadership surprisingly agreed to this initiative, indicating a changed transatlantic relationship in which Europe is increasingly taking responsibility for its defense.

European defense spending reached approximately 21 percent of global military expenditures in 2025, according to estimates from the International Institute for Strategic Studies (IISS), led by Germany. This development is part of a global trend: Global defense spending rose from $2.48 trillion in 2024 to $2.63 trillion in 2025. The NATO commitment to the 5 percent target reinforces the expectation that this upward momentum will continue at least until 2026.

In parallel with budget increases, NATO is intensifying its operational readiness. The STEADFAST DART 26 exercise, completed on February 20, 2026, in northern Germany, demonstrated the alliance's capability for modern multi-domain operations. Further large-scale exercises are planned for 2026, including SEA SHIELD 26 (March 31 to April 28 in the Black Sea), a multinational naval operation led by Romania, as well as DEFENDER-Europe 26 with a geographical focus on the Nordic-Baltic region – a rotation from the southern orientation of DEFENDER-Europe 25.

Particularly significant is the deployment of a Sweden-led battlegroup in Rovaniemi, Finland, which will begin operations in 2026. This expansion of NATO's Enhanced Forward Presence underscores the strategic importance of the Arctic dimension of European security. However, a recent analysis also reveals critical gaps: NATO is not adequately prepared for drone warfare in the Arctic, experts say. Personnel challenges – particularly the lack of qualified drone operators, software specialists, and specialized maintenance technicians – exacerbate this problem, as many NATO allies are already struggling with recruitment and retention of personnel.

In response to this challenge, five European nations – the so-called E5 group – have pledged several million euros for the development of cost-effective drone defense systems. Poland is already collaborating with Ukraine on drone technology in joint military training programs and manufacturing projects. This cooperation has been fueled by a series of incidents in which Europe's borders and airports were tested by unidentified drones. Russia is blamed for some of these incidents but denies any involvement.

In the area of missile defense, NATO has announced a "High Visibility Project" involving seven allies, including France. The goal is to strengthen defenses against ballistic missiles through the integration of sensors, interceptors, and tactical command systems. The flagship systems mentioned in European debates are Patriot and SAMP/T, but crucial is their networking: An isolated battery is not sufficient; networks, coordination rules, and robust data connections are required.

The technological dimension of this rearmament is also being advanced by the NATO Innovation Fund and the DIANA Accelerator Network. These complementary mechanisms, supported by an updated political framework, could fundamentally change the interaction between deep-tech startups, private investors, and national industrial strategies within the transatlantic security ecosystem by 2026 and beyond.

The strategic implications of these developments are far-reaching. Europe is moving from a defense policy of restraint to one of active deterrence and resilience. The combination of significantly increased defense budgets, the promotion of domestic arms industries, intensified operational readiness, and technological innovation signals an era of strategic independence. However, this transformation does not come without challenges: The fiscal burdens are enormous, the technological gaps – particularly in space capabilities, geospatial intelligence, and ballistic missile early warning – are significant, and the dependence on American support in key areas remains.

NATO Secretary General Mark Rutte has urged allies not to worry about a possible reduction in U.S. troop presence but simply to increase military budgets and work towards the 5 percent target. He pointed to Lithuania as a "good example" of this approach. This statement reflects a pragmatic realization: Europe's security will increasingly lie in European hands. The question is no longer whether Europe needs to do more for its defense, but how quickly and effectively this transformation can succeed.