Four years after Russia’s full-scale invasion of Ukraine, Europe is once again confronting a difficult question: should it build its own army?
Calls for Europe to take greater responsibility for its own security are growing louder. The war in Ukraine has exposed gaps in military readiness, coordination, and defense production across the continent. At the same time, tensions with the United States under President Donald Trump have reignited long-standing concerns about Europe’s dependence on Washington for security guarantees.
Yet despite decades of debate, the idea of a unified European Union army remains deeply controversial.
Why the Debate Is Intensifying in 2026
The war launched by Russia against Ukraine has reshaped Europe’s security landscape. What many once viewed as an unthinkable large-scale war on European soil has become a grinding, multi-year conflict.
At the same time, uncertainty surrounding transatlantic relations has unsettled policymakers. Concerns over shifting U.S. commitments to European security have pushed leaders to reconsider whether the continent should be able to defend itself more independently.
The concept of a European army is not new. It dates back to the early years of post-Second World War integration. But in 2026, the conversation has taken on new urgency.
A Proposal for 100,000 EU Troops
At the World Economic Forum in Davos, Andrius Kubilius, the European Union’s Commissioner for Defense and Space, suggested that the EU should consider creating a standing military force of 100,000 troops capable of fighting “as Europe.”
Such a force, he argued, would strengthen the EU’s ability to respond quickly and cohesively to external threats.
The idea is not necessarily to replace national armies but to create a unified, ready-to-deploy European capability — something that currently does not exist at scale.
Kubilius’s remarks reflect a growing frustration among some policymakers about fragmentation in Europe’s defense systems. With 27 member states maintaining separate national militaries, procurement systems, and command structures, duplication and inefficiencies are common.
Focus on Integration, Not Duplication
Spain’s foreign minister, Jose Manuel Albares, has emphasized the need for deeper integration of Europe’s defense industry rather than simply multiplying national efforts.
He argued that a coordinated approach would be far more efficient than maintaining 27 separate national armies. Joint procurement, shared research and development, and interoperable systems could potentially reduce costs while increasing effectiveness.
In practical terms, integration could mean:
- Coordinated weapons production
- Standardized military equipment
- Shared logistics systems
- Joint training and planning
Supporters believe such steps would help Europe close capability gaps revealed by the Ukraine war.
Strong Pushback Against a Separate EU Army
However, not everyone agrees that creating a standalone EU army is the right path.
Kaja Kallas has warned that a Europe-wide army would be “extremely dangerous,” arguing that proponents have not fully thought through the practical implications.
Her primary concern revolves around duplication with NATO. Most EU member states are already part of NATO, which serves as the backbone of Europe’s collective defense.
“If you are already part of NATO, then you can’t create a separate army,” she cautioned, highlighting the risk of overlapping command structures and divided strategic priorities.
Critics worry that a separate EU force could:
- Undermine NATO cohesion
- Create confusion in crisis situations
- Divert resources from strengthening existing alliances
Public Opinion: Cooperation Over a Full Army
Defense experts suggest that European citizens may be more open to deeper defense cooperation than to the creation of a completely separate EU army.
In many countries, national sovereignty over armed forces remains politically sensitive. Handing command authority to a supranational body could face resistance, especially in states with strong military traditions or constitutional constraints.
However, increased collaboration — such as joint battlegroups, shared procurement programs, and integrated defense industries — tends to attract broader support.
In other words, Europeans may favor practical steps toward unity without fully merging their national armies into a single force.
Europe’s Struggle to Unite
The past four years have demonstrated how difficult it can be for Europe to act with one voice on defense matters.
While the EU has coordinated sanctions against Russia and provided military and financial support to Ukraine, disagreements persist over spending levels, weapons transfers, and long-term strategy.
Some countries have significantly boosted defense budgets, while others remain cautious. Differences in geography, threat perception, and political priorities continue to shape national positions.
Eastern European states, closer to Russia, often favor stronger military commitments. Southern or Western members may prioritize other strategic challenges.
The Bigger Strategic Question
At the heart of the debate lies a fundamental issue: can Europe guarantee its own security if U.S. support becomes less predictable?
For decades, NATO — and by extension, American military power — has underpinned Europe’s defense architecture. The Ukraine war has reaffirmed NATO’s importance, but it has also highlighted Europe’s dependence on U.S. intelligence, logistics, and high-end military capabilities.
An EU army, proponents argue, would symbolize strategic autonomy. Opponents counter that strengthening NATO and improving European capabilities within that framework is a more realistic and less risky path.
Four years into the Ukraine war, Europe finds itself at a crossroads.
The threat from Russia and evolving U.S. relations have revived an old idea: a single European army. Yet political divisions, NATO commitments, and concerns about sovereignty continue to complicate the proposal.
For now, deeper defense cooperation appears more achievable than a fully unified EU army. Whether Europe ultimately takes the leap toward a common force — or opts instead for gradual integration — will shape the continent’s security architecture for decades to come.
