The Catalyst: Ukraine + Trump

European defense was fundamentally transformed by two events in 2022 and 2025:

24 February 2022: Russia's full-scale invasion of Ukraine demonstrated that large-scale conventional warfare had returned to European territory. The assumptions of the "peace dividend" era — that European armies needed only for peacekeeping and expeditionary operations — collapsed overnight.

20 January 2025: Trump's return to the White House, followed by Vance's Munich Security Conference speech and Hegseth's Pentagon aid review, shattered the assumption that US security guarantees were unconditional and permanent. If Washington could walk away from its commitments to Ukraine, it could walk away from Article 5 as well.

The combination of a demonstrated Russian threat and a demonstrated American unreliability created a European security consensus of a kind not seen since the Cold War itself.

ReArm Europe Program

The European Commission launched ReArm Europe in February/March 2025 — a comprehensive €800 billion defense investment program using every available EU fiscal mechanism:

Funding Mechanisms

• EU budget reallocation: €150 billion in loan guarantees for defense procurement (SAFE — Security Action for Europe)
• Escape clause activation: Exemption from EU fiscal rules for defense spending, allowing member states to exceed 3% deficit limits for defense investments
• EIB (European Investment Bank) mandate expansion: EIB authorized for direct defense industrial lending
• Private capital mobilization: EU financial regulation changes enabling pension funds and institutional investors to include defense industry in ESG-compliant portfolios
• National borrowing capacity: The fiscal rule exemption effectively unlocks an estimated €500+ billion in additional national borrowing headroom for defense

Political Leadership

ReArm Europe was pushed through by European Commission President Ursula von der Leyen with critical support from France, Germany (under Merz), and Poland. It passed with a qualified majority, with Hungary and Slovakia dissenting.

National Defense Budget Increases

NATO's 2% GDP spending target — long aspirational for most European members — has been surpassed across the alliance as of 2025–26:

In absolute dollar terms, the increase in combined European NATO defense spending in 2023–2026 represents over $150 billion additional per year compared to pre-war levels.

Germany's Defense Revolution Under Merz

Germany's transformation is the most dramatic European case and the most consequential given Germany's economic size (the largest European economy) and its central role in European Security.

Under 16 years of Merkel and then 3 years of Scholz, Germany was the emblematic case of European defense free-riding — promising reforms while delivering minimal increases and refusing to supply weapons to conflict zones. The Scholz government's 2022 Zeitenwende pledge (a €100 billion special defense fund and 2% GDP commitment) was groundbreaking in rhetoric but slow in execution.

Friedrich Merz, who won Germany's 23 February 2025 election, moved with unusual speed:

• Approved Taurus missile deliveries to Ukraine within weeks of taking office
• Launched a new €100 billion defense investment fund (on top of Scholz's)
• Committed Germany to 3% GDP defense spending by 2027
• Dramatically accelerated German defense industry capacity — Rheinmetall's shell production from 300k to over 1m rounds per year
• Germany became the largest European bilateral Ukraine supporter in 2025
• Led European coordination on Ukraine with France and UK

See: Friedrich Merz Profile

European Defense Industry Expansion

European defense spending increases are beginning to translate into industrial capacity:

Artillery Ammunition

• EU 155mm shell production: from ~300k/year (2022) to estimated 1.5–2 million/year (end 2025)
• Rheinmetall (Germany) opened new production lines in Germany, Lithuania, and Romania
• Czech-led initiative (Joint Procurement) delivered ~500k rounds to Ukraine from non-Western stocks

Air Defense

• Significant orders for IRIS-T, NASAMS, Patriot upgrades across European members
• Franco-German joint air defense initiative (MGCS-related)
• MBDA (missile manufacturer) expanding production of Aster, Meteor, Storm Shadow

Armored Vehicles and Tanks

• Leopard 2 production restart and upgrades — Germany and partners
• Poland ordering Abrams, K2, Leopard simultaneously — largest armored buildup in Europe
• Multiple countries replenishing armored inventories depleted by Ukraine aid transfers

Drones

• Multiple European countries investing in domestic drone industries, partly learning from Ukraine
• Military drone procurement and development accelerating
• Counter-drone systems becoming major procurement priority

The Ammunition Crisis and European Response

One of the most significant lessons of the Ukraine war for European defense planning was the revelation of European ammunition production shortfalls. NATO members had built force structures assuming they would never face a high-intensity conventional war requiring thousands of shells per day.

Pre-war, European NATO members collectively produced roughly 300,000 155mm shells per year — about one month of consumption at Ukraine war rates. The shortfall was embarrassing and dangerous.

The European response has been substantial:

• EU set a target of 2 million 155mm rounds per year by end 2025 — largely achieved
• Multiple new production lines opened across Europe
• Investment in propellant and explosive precursor production (identified bottleneck)
• Stockpiling programs: European members now required to maintain minimum reserve stocks
• Joint procurement mechanisms to benefit from scale efficiencies

Air Defense Priority

Ukraine's experience under massive Russian aerial and missile bombardment transformed European thinking on air defense. Countries that previously considered air defense systems expensive and low-priority are now in procurement queues for years:

• Patriot systems: Order queues extending years, production bottlenecked
• IRIS-T SL: Germany supplying Ukraine while ordering replacements for itself
• SHORAD (short-range): Germany, Poland, Czech Republic all in procurement
• Counter-drone: Every European military now has counter-UAS as top acquisition priority

The Ukraine experience of destroying civilian infrastructure through drone swarms at modest cost has made counter-drone capability a NATO-level top priority.

Related: Best Air Defense Systems 2025

European Peacekeeping Discussions

Alongside the defense spending surge, Europe has been exploring Ukrainian peacekeeping concepts — the deployment of European troops as a ceasefire monitoring force or security guarantee mechanism:

• UK-France-led discussions on a "willing coalition" that could deploy European forces to Ukraine post-ceasefire
• The EU's ambitions for a "Reassurance Force" — a European multinational presence
• Macron's consistent advocacy for European willingness to put "boots on the ground" if needed
• Germany's Merz more cautious than Macron but open to discussion
• US position (Hegseth/Trump): No US troops in any peacekeeping; Europe must provide the physical presence
• Ukraine's position: Welcomes discussion but wants NATO members specifically, not just a non-aligned European force

The logistical, political, and command-and-control challenges of deploying a large European force in a post-ceasefire Ukraine are significant. The discussions remain at conceptual stage as of February 2026.

Limits and Challenges

Despite the unprecedented surge, European rearmament faces real constraints:

• Industrial capacity: Defense production lines can't be built overnight — 2025 spending decisions create 2028–2030 capabilities
• Personnel: European militaries are undermanned; conscription is returning in some countries but takes years to produce trained soldiers
• Nuclear deterrence: Only France and UK have nuclear capabilities in Europe; Germany and others depend entirely on US extended deterrence
• Command and interoperability: Multinational force coordination remains dependent on US C2 and logistics systems
• Political sustainability: Will defense levels hold through political cycles? Europe's history is littered with defense spending commitments that were abandoned
• Fiscal pressure: Higher defense spending competes with social spending, infrastructure, climate investment

Frequently Asked Questions