NATO Explained: Why EU Cannot Replace Alliance | European Security Guide

What is NATO and Why Can't the EU Replace It?

The North Atlantic Treaty Organization (NATO) remains Europe's primary security framework, but former Secretary General Jaap de Hoop Scheffer warns that the European Union cannot replace the 75-year-old alliance. In exclusive comments to BNR, the former NATO chief emphasized that while NATO needs 'Europeanization' through more European commanders and military presence, the EU lacks the institutional capacity, military structure, and membership composition to serve as a substitute for the transatlantic alliance.

The Europeanization Imperative: NATO's Future Structure

De Hoop Scheffer argues that Europe's primary responsibility is to make NATO more European, not to create alternative structures. 'We need more European command positions and greater European military presence in NATO's European sectors,' he stated. This comes amid growing concerns about potential U.S. troop withdrawals, with approximately 70,000-80,000 American military personnel still stationed across Europe. The former secretary general notes that while President Donald Trump has repeatedly threatened NATO withdrawal, actual departure would require Congressional approval and prove extremely costly.

Key Differences: EU vs NATO Capabilities

The European Union faces fundamental limitations in replacing NATO's security architecture:

• No EU Army: The European Union lacks a unified military command structure
• Membership Gaps: Key NATO members like Norway and Turkey (with NATO's second-largest military) are not EU members
• Command Integration: NATO's integrated command system took decades to develop
• Nuclear Deterrence: Only France and the UK possess nuclear capabilities within Europe

De Hoop Scheffer clarifies: 'When discussing hard security, I talk about Europe, not the European Union. I don't discuss a European army, but the EU can do tremendous work in coordinated weapons procurement.'

European Nuclear Deterrence: The 'Force de Frappe' Debate

Europe's nuclear capabilities represent another critical distinction. France and the United Kingdom, along with several other nations, are already discussing a European 'force de frappe' - a nuclear deterrent capability. However, as the former NATO chief warns, 'It will take time before Europe can stand on its own feet. Politically, diplomatically, but especially militarily. This requires long-term major investments.'

Recent developments show France expanding its nuclear arsenal and extending deterrence to eight European allies through the Northwood Declaration nuclear cooperation framework. This represents the most significant shift in French strategic thinking since 1960, though France retains sole decision-making authority over nuclear use.

The Trump Factor: U.S. Commitment and Credibility

De Hoop Scheffer addresses the elephant in the room: 'Americans need NATO just as much as the reverse. But this is underestimated in Washington. Trump refuses to acknowledge this because it doesn't fit his narrative, but that's the reality.' The former secretary general emphasizes that what's particularly damaging to NATO is Trump's persistent undermining of the alliance, which erodes both American moral authority and NATO's credibility.

According to a Reuters exclusive from April 9, 2026, Trump is considering withdrawing some U.S. troops from Europe amid ongoing NATO strains. Such a move would represent a major strategic shift, though experts note that complete U.S. withdrawal would require Congressional approval under the 2023 National Defense Reauthorization Act, followed by a one-year notice period.

Europe's Defense Reality: Capability Gaps and Investment Needs

European NATO members have significantly increased defense spending, now exceeding $450 billion annually - nearly double 2022 levels. However, Europe cannot quickly replace America's 'invisible architecture' including satellite surveillance, missile defense systems, and integrated command structures. As NATO Secretary General Mark Rutte bluntly stated, Europe cannot defend itself without U.S. support, dismissing complete autonomy as 'unrealistic dreaming.'

The EU has an €800 billion defense plan, and European members have pledged to increase defense spending to 5% of national income by 2035. Yet significant challenges remain, including fragmentation, system duplication, and coordination gaps. Experts suggest Europe could make substantial progress by 2030 in acquiring critical capabilities like intelligence, satellites, and long-range missiles, but complete autonomy remains distant.

Future Implications: A Transformed NATO

The alliance will likely continue existing but with a transformed appearance featuring less dominant U.S. leadership. De Hoop Scheffer concludes: 'So NATO will continue to exist, but it will look different with a much less dominant role for the United States.' This evolution reflects broader geopolitical shifts, including Russia's ongoing aggression in Ukraine and growing concerns about European defense autonomy debates.

European leaders increasingly advocate for greater autonomy, with Spain's foreign minister calling for a European army and France's minister insisting Europeans must take charge of their own security. However, the practical reality remains that Europe's security architecture depends on transatlantic cooperation, even as the balance within that cooperation evolves.

Frequently Asked Questions

Can the EU replace NATO for European security?

No. The EU lacks a unified military command, excludes key NATO members like Turkey and Norway, and cannot replicate NATO's integrated defense architecture developed over 75 years.

What would happen if the U.S. withdrew from NATO?

While NATO wouldn't collapse immediately, the alliance would lose its primary military power and command structure. Europe would need to rapidly develop capabilities currently provided by the U.S., including satellite surveillance and missile defense systems.

How is Europe strengthening its defense capabilities?

European NATO members have doubled defense spending since 2022 to over $450 billion annually. France and the UK are enhancing nuclear cooperation through the Northwood Declaration, and the EU has an €800 billion defense plan.

What is NATO 'Europeanization'?

This refers to increasing European leadership within NATO through more European commanders, greater European military presence in NATO's European sectors, and enhanced European defense investment while maintaining the transatlantic alliance framework.

Can Europe develop its own nuclear deterrent?

France and the UK already possess nuclear capabilities and are expanding cooperation. France has extended nuclear deterrence discussions to eight European allies, but complete European nuclear autonomy remains complex and politically challenging.

Sources

BNR Interview with Jaap de Hoop Scheffer
Reuters: Trump Weighs Troop Withdrawals
NATO: Jaap de Hoop Scheffer Biography
BBC: France Expands Nuclear Defense
The Guardian: European Defense Challenges