From Fragmentation to Coherence: Closing the AFSJ–CSDP Coordination Gap through EUAM Ukraine

Executive Summary

The European Union’s security architecture remains structurally fragmented between its internal Area of Freedom, Security and Justice (AFSJ) and its external Common Security and Defence Policy (CSDP) framework. This institutional divide generates legal incoherence, accountability gaps, and operational inefficiencies that hybrid threats and high-intensity crises actively exploit. The EUAM Ukraine mission, particularly following the 2022 Russian invasion, provides a critical case illustrating how the absence of a formalised coordination mechanism between AFSJ actors (such as Europol and Frontex) and CSDP structures leads to fragmented situational awareness, delayed information-sharing, and reliance on informal coordination channels.

This paper argues that strengthening the EU’s resilience requires operationalising coherence through a concrete and feasible reform. It proposes the establishment of an EU Integrated Security Coordination Protocol to enable structured information exchange and joint crisis assessment across internal and external security frameworks. Such a mechanism would enhance responsiveness, reinforce institutional trust, and improve the EU’s capacity to act coherently in complex security environments.

Introduction

The evolving security landscape in Europe has rendered the traditional separation between internal and external security increasingly untenable. Hybrid threats and cross-border instability operate across legal and institutional boundaries, exposing structural limitations in EU security governance. While the need for greater coherence between the Area of Freedom, Security and Justice (AFSJ) and the Common Security and Defence Policy (CSDP) is widely acknowledged, progress remains largely conceptual and insufficiently operationalised.

The EUAM Ukraine mission provides a critical lens through which to examine this challenge in practice. Following the 2022 Russian invasion, the mission has operated in a high-pressure environment requiring rapid coordination between internal security actors and external crisis management structures. This paper uses EUAM Ukraine as a stress test of the EU’s fragmented security architecture, arguing that the absence of a formalised coordination mechanism between AFSJ and CSDP actors constitutes a critical operational gap undermining both effectiveness and institutional credibility.

The Critical Gap

The most critical weakness in the European Union’s security governance architecture is not fragmentation in abstract terms, but the absence of a formalised coordination mechanism between AFSJ actors and CSDP structures in high-intensity crisis environments. While both pillars have developed significant capabilities, their interaction remains largely ad hoc, particularly in contexts requiring rapid cross-domain response.

In practice, this gap manifests in limited information-sharing, fragmented situational awareness, and delayed coordination between internal security agencies—such as Europol, Frontex, and Eurojust—and CSDP mission headquarters. Cooperation relies heavily on informal liaison arrangements and case-specific initiatives rather than institutionalised protocols, constraining the EU’s ability to respond coherently to complex security challenges (European Court of Auditors, 2022).

This limitation becomes acute in crisis scenarios where speed, coordination, and clarity of responsibility are essential. The absence of a predefined framework for joint assessment and information exchange creates inefficiencies and increases the risk of duplication, delayed response, and partial visibility of evolving threats. Despite repeated recognition of the need for greater interoperability between internal and external security instruments (European Parliament, 2023; Council of the European Union and European External Action Service, 2022), no mechanism currently ensures systematic coordination.

Addressing this gap requires moving beyond general calls for “coherence” and identifying a specific, operationally viable entry point for reform. The challenge is not conceptual alignment, but the establishment of a coordination mechanism capable of functioning under real crisis conditions.

EUAM Ukraine as a Stress Test

The EU Advisory Mission in Ukraine (EUAM Ukraine) provides a relevant case to examine the operational consequences of fragmented EU security governance. Established in 2014 to support civilian security sector reform, the mission was intended to bridge internal security practices and external crisis management. However, the full-scale Russian invasion in 2022 transformed its operational environment, requiring rapid adaptation and closer coordination with both EU and international security actors.

This shift exposed the limitations of coordination between AFSJ agencies and CSDP structures. While EUAM Ukraine operated in a context where timely information-sharing and situational awareness were critical, cooperation with internal security actors—such as Europol and Frontex—remained largely dependent on informal liaison channels and case-by-case coordination. The absence of a structured framework for cross-pillar information exchange continues to hinder coherence in EU external crisis response (European External Action Service, 2023; European Parliament, 2023).

In practice, this resulted in fragmented situational awareness and uneven information flows across institutional boundaries. The lack of a permanent coordination mechanism limited the development of a shared operational picture and slowed the alignment of internal and external responses. EU actors often operated in parallel, with coordination emerging reactively rather than through predefined procedures. This reduced the speed of information exchange and weakened the EU’s ability to anticipate and respond effectively to rapidly evolving threats.

EUAM Ukraine illustrates a broader structural issue: the EU’s security architecture can adapt under pressure but lacks the institutional tools to translate that flexibility into sustained coherence. The challenge is not the absence of expertise or resources, but the absence of a formalised mechanism capable of integrating them in real time.

Why the Divide Persists

Despite its well-documented operational costs, the divide between the AFSJ and the CSDP persists due to structural, legal, and political constraints embedded in the EU’s institutional architecture. The separation between internal and external security reflects deliberate choices in the EU Treaties, which assign distinct legal bases, procedures, and accountability mechanisms to each domain.

From a legal perspective, the AFSJ operates primarily under the Treaty on the Functioning of the European Union (TFEU), while CSDP actions are governed by the Treaty on European Union (TEU). This dual framework creates barriers to interoperability, particularly in information-sharing, data protection, and judicial oversight, where standards and competences differ significantly.

Politically, member states have been reluctant to blur the boundaries between internal and external security competences, viewing such integration as a potential encroachment on sovereignty. Concerns over civil liberties and data protection reinforce this resistance, especially when cooperation involves sensitive law enforcement information. As a result, coordination efforts remain largely informal or limited in scope.

Understanding these constraints is essential to ensure that any proposed solution is realistic and implementable. The persistence of the divide reflects not a lack of awareness, but the absence of politically and legally viable mechanisms capable of bridging it.

Policy Recommendation

Addressing the AFSJ–CSDP coordination gap requires a focused and operationally viable first step, rather than broad institutional reform. This paper proposes the establishment of an EU Integrated Security Coordination Protocol (EISCP) as a formal mechanism to enable structured information-sharing and joint situational assessment between AFSJ actors and CSDP mission structures in crisis environments.

The EISCP would function as a predefined coordination framework activated in high-intensity or cross-border crisis scenarios. Its primary objective would be to ensure timely and systematic exchange of relevant operational information between agencies such as Europol, Frontex, and Eurojust, and CSDP mission headquarters, including civilian missions such as EUAM Ukraine. This would support the development of a shared situational awareness and facilitate more coherent and coordinated responses.

From an institutional perspective, the protocol would not require Treaty revision, but could be implemented through an inter-institutional agreement supported by existing legal provisions governing information exchange and operational cooperation. Importantly, it would incorporate clear safeguards to ensure compliance with data protection and fundamental rights standards, addressing key political sensitivities that have historically limited deeper integration.

As a first tractable reform, the EISCP would not eliminate the structural divide between AFSJ and CSDP frameworks, but would provide a practical mechanism to mitigate its most damaging operational effects. By institutionalising coordination in a targeted and legally feasible manner, it would enhance responsiveness, reduce fragmentation, and strengthen the EU’s capacity to act coherently in complex security environments. Such a protocol would provide a scalable model for future EU crisis responses beyond the Ukrainian context.

Conclusion

The case of EUAM Ukraine demonstrates that the European Union’s challenge is not a lack of capacity, but a lack of coherence in how its security instruments interact under pressure. The persistent divide between AFSJ and CSDP frameworks undermines the EU’s ability to deliver a unified and timely response to complex crises.

Bridging this gap does not require structural overhaul, but the introduction of targeted and operationally viable mechanisms. The proposed EU Integrated Security Coordination Protocol represents a realistic first step towards institutionalising coordination and improving responsiveness. Enhancing coherence in this way is essential for both operational effectiveness and the EU’s credibility as a security actor.

References

Council of the European Union and European External Action Service (2022) A Strategic Compass for Security and Defence. Brussels/Luxembourg: Publications Office of the European Union.

European Court of Auditors (2022) EU support for Security and Defence. Luxembourg: Publications Office of the European Union.

European External Action Service (2023) Annual Report on the Common Security and Defence Policy. Brussels: European External Action Service.

European Parliament (2023) Report on the Effectiveness of CSDP Missions. Brussels: European Parliament.