European NATO allies hold economic and air advantages over Russia, but critical shortages mean they remain dependent on US support for continental defense. While European budgets significantly outspend Moscow, structural deficits in ground troops, air defenses, and ammunition constrain their overall military readiness.
Spain remains directly involved in this military balance through troop deployments in Eastern Europe and strategic command centers hosted on national territory. Madrid's geographical distance from Russia reduces exposure to land offensives, but does not alter its allied commitments or logistical requirements.
The 32 NATO member nations coordinate forces through joint plans rather than a single unified standing army. European partners, which include non-EU members such as the United Kingdom, Norway, and Turkey, maintain assigned units in their home countries until deployment commands are issued.
European Military Budgets and Operational Readiness
Data from the Stockholm International Peace Research Institute shows that 29 European NATO members spent 559 billion dollars in 2025, compared to 190 billion dollars spent by Russia. European military spending reached nearly three times Russia's total in current dollars, even though Moscow devoted 7.5 percent of its gross domestic product to defense.
Budget comparisons do not reflect equal purchasing power, as production costs, salaries, and industrial structures vary widely between nations. Furthermore, defense funding often pays for long-term research or infrastructure that takes years to mature into operational battlefield capabilities.
An assessment published in September 2026 by the International Institute for Strategic Studies identified shortages in personnel, artillery, air defense, ammunition, and sustainment across European land forces. The report concluded that European partners are unlikely to assume the core of conventional continental defense without American resources before 2030.
Ground Force Mass and Industrial Production
A study published in November 2025 by the French Institute of International Relations highlighted European advantages in training, command quality, and combined arms operations, while attributing superior mass, firepower, and mobilization capacity to Russia. Effective ground combat requires advanced armor to operate alongside infantry, engineers, air defense, and continuous supply lines.
NATO maintained nine multinational battlegroups on its eastern flank in June 2026, with plans to reinforce existing troops, expand select formations to brigade size, and pre-position equipment. At the presentation of The Military Balance 2026, Bastian Giegerich noted that Moscow has demonstrated a capacity to adapt and expand battlefield innovations despite suffering heavy losses in Ukraine.
Equipment availability further complicates force calculations, as stored vehicles often require extensive repairs or lack trained crews before entering service. Long development timelines for future European tank programs demonstrate that fleet modernization requires years of steady industrial effort.
Military intelligence from Estonia estimated that Russia produced approximately seven million artillery rounds in 2025, including 3.4 million howitzer shells alongside tank, mortar, and rocket ammunition. Moscow supplemented its domestic output with shipments from North Korea and Iran, whereas European production metrics often track only 155 millimeter shells.
Research by Jack Watling and Oleksandr Danylyuk for the Royal United Services Institute between 2022 and 2024 attributed an initial industrial coordination advantage to Russia over a fragmented European defense market. However, industrial mobilization imposes significant costs on Russia through state subsidies, credit expansion, and resource diversion from civil sectors.
Air Power and Maritime Security Lines
Although European air forces maintain quantitative and qualitative advantages over Russia, an analysis by Ifri indicated that sustaining air superiority without major US assistance requires expanding ammunition stockpiles, air defenses, and radar suppression capabilities. Royal United Services Institute specialist Justin Bronk warned in January 2026 that Russian aviation poses an increased threat to Western forces, utilizing glide bombs to launch standoff attacks while dense ground-based air defenses continue to challenge allied flights.
Drones have transformed reconnaissance and strike operations, with RUSI researchers Sidharth Kaushal and Sam Cranny-Evans reporting in August 2026 that Russia improved its coordination of precision drone strikes. Nevertheless, researchers noted that Russia continues to struggle to convert heavy fire pressure into decisive frontline breakthroughs.
Maritime security in the Atlantic remains vital for securing US reinforcement routes to Europe. A study titled The Atlantic Bastion by Kaushal and Commander Edward Black in December 2025 recommended combining manned platforms and uncrewed systems to track Russian submarines, whose nuclear attack fleet remained largely intact despite losses suffered in the Black Sea.
The accession of Finland and Sweden strengthened NATO's northern position, but Swedish Armed Forces chief of operations Vice Admiral Ewa Skoog Haslum rejected describing the Baltic Sea as a NATO lake in a March 2026 interview with Le Monde, emphasizing that the sea remains actively contested.
American Integration and Spanish Military Commitments
European defense relies heavily on US space launches, satellite intelligence, early missile warning, and orbital tracking networks. The International Institute for Strategic Studies noted that replacing these American strategic capabilities represents a distinct challenge from standard burden-sharing, requiring separate timelines and substantial capital investment.
Tactical coordination between allied forces requires compatible communication systems and shared operational procedures. In June 2026, Spanish telecommunications provider Telefónica documented its deployment of secure 5G tactical networks during a military exercise in Slovakia.
Logistical mobility presents administrative and physical hurdles for moving troops across borders. The Council of the European Union approved its negotiating position on June 17, 2026, for regulations aimed at streamlining transit permits, upgrading dual-use civilian infrastructure, and securing transport assets.
In February 2026, Estonian foreign intelligence assessed that Russia had no intention of launching a military attack against Estonia or other NATO allies during the following year, attributing the deterrence to allied defensive measures. Meanwhile, IISS evaluations projected that Russia could address its personnel and equipment shortages by 2030 if current production and recruitment rates persist.
Collective defense obligations remain governed by Article 5 of the North Atlantic Treaty, which states that an armed attack against one member is considered an attack against all, obligating members to assist through measures including military force.
Spain's Operational Role and Defense Spending
Spain demonstrates its commitment through forward deployments and strategic infrastructure. In May 2026, the Spanish General Staff announced the deployment of 1,600 military personnel and over 300 vehicles for exercise Strong Lineage 26, shipping equipment from Almería to Slovenia before moving in convoys to Slovakia and Hungary. Spain has led the multinational battlegroup in Slovakia since July 2024 and maintains rotated troops in Latvia.
On Spanish territory, Torrejón de Ardoz hosts a NATO Combined Air Operations Centre responsible for 24-hour air defense monitoring across 15 nations, as outlined by the Defense Ministry in August 2026. At the naval base in Rota, American destroyers participate in allied air and missile defense, with the US Sixth Fleet reporting the return of the USS Roosevelt in March 2026.
SIPRI reported that Spain's military expenditure reached 40.2 billion dollars in 2025, representing a 50 percent real growth over 2024. While the 2025 Hague Summit declaration established a target of 5 percent of GDP by 2035, Spanish Prime Minister Pedro Sánchez stated in July 2026 that Spain could fulfill its agreed NATO capability goals with a defense allocation of 2.1 percent of GDP.
Spanish industrial programs are progressing across multiple domains. Shipbuilder Navantia reported in July 2026 that the first F110 frigate, Bonifaz, was afloat in Ferrol undergoing systems installation ahead of a scheduled 2028 delivery. Under the Halcón II contract announced in December 2024, Airbus set first deliveries of 25 Eurofighters assembled in Getafe for 2030 to replace aging F-18 aircraft, while defense firm Indra presented advanced radar and counter-drone systems in Riyadh in February 2026.
Civilian resilience also forms part of the national defense posture. Spain's 2025 Annual National Security Report, approved in April 2026, documented intensified Russian espionage, sabotage, disinformation, and cyberattacks targeting European administrations and infrastructure, while a September 2026 study by the Bank of Spain highlighted the economic inflation and growth risks associated with potential energy market disruptions during international conflicts.
