Diplomatic Compass · Edition No. 3 · 22 December 2025 · By Hafsa M. Temsamani, PhD

Editorial

Continuity Under Pressure

As 2025 draws to a close, headline-driven debates and political contention dominate public discourse across the Euro-Atlantic space, while Russia’s war of aggression against Ukraine continues to define the strategic baseline. Beneath this intensity, decisions on force posture, resourcing, coordination mechanisms, and external engagement reveal how NATO and its partners are positioning themselves for the year ahead.

This edition of Diplomatic Compass focuses on those underlying signals. Rather than tracking political controversy, it examines how the Alliance sustains credibility under pressure — through budgetary choices, operational steadiness, managed NATO–EU coordination, and calibrated engagement beyond Allied territory.

As the final edition of 2025, the objective remains unchanged: to read developments not in isolation, but as part of a broader strategic pattern shaping NATO’s posture and the wider Euro-Atlantic security environment as it enters 2026.

Spotlight Event

European Council (18 December 2025)

EU Heads of State and Government met at a decisive moment for Ukraine and the wider Euro-Atlantic security environment. The meeting confirmed continued political alignment around sustaining Ukraine’s resilience as a precondition for a just and lasting peace.

Pillar 1: NATO Affairs

1.1 Money Talks: Allies Lock in NATO’s 2026 Common Budgets

At a North Atlantic Council meeting on 16 December 2025, Allies agreed NATO’s common-funded budgets for 2026, consolidating the Alliance’s institutional resourcing at a time of heightened operational and strategic demand.

The decision sets the Civil Budget at EUR 528.2 million and the Military Budget at EUR 2.42 billion, with overall common funding reaching up to EUR 5.3 billion when combined with the NATO Security Investment Programme. The agreement confirms sustained political consensus around common funding as a core instrument of Alliance cohesion.

Beyond the figures, the NAC decision secures continuity in resourcing the NATO Command Structure, Alliance-level decision-making, and enabling capabilities underpinning deterrence, readiness, and interoperability. In parallel with rising national defence expenditure across the Alliance, the 2026 budgets anchor NATO’s ability to translate political decisions into executable outputs.

Pillar 2: Euro-Atlantic Security

2.1 Beyond the Withdrawal Narrative: U.S. Congress’ $900bn Defense Bill Reaffirms Commitment to NATO, Europe and Ukraine

The U.S. Congress’ adoption of the Fiscal Year 2026 National Defense Authorization Act (FY2026 NDAA), authorising approximately $900 billion in defence policy and funding, constitutes a hard signal of strategic continuity in the Euro-Atlantic theatre. At a time when political debate is shaped by selective readings of U.S. strategic guidance and speculation over retrenchment, the NDAA provides a more reliable indicator of Alliance-relevant intent: force posture, authorities, and resources remain intact.

Recent U.S. strategic documents, including the National Security Strategy (NSS), have prioritised global competition, Indo-Pacific dynamics, and burden-sharing expectations. However, it is the NDAA that translates strategic orientation into binding military realities. In this sense, the FY2026 NDAA functions as the practical counterpart to the NSS, anchoring declared priorities in deployments, command relationships, and resourcing decisions that directly affect NATO’s deterrence and defence posture.

The Act preserves a forward-deployed U.S. force posture of approximately 100,000 personnel in Europe, with sustained presence across Germany, Poland, the Baltic region, and Romania. Crucially, it introduces procedural and political constraints on rapid or unilateral drawdowns, reinforcing predictability for NATO defence planning, force-generation cycles, and graduated response options.

The FY2026 NDAA also sustains U.S. military assistance to Ukraine, authorising approximately $800 million under the Ukraine Security Assistance Initiative (USAI) across two fiscal years. This funding supports procurement, training, and sustainment, reinforcing the credibility of NATO’s eastern flank deterrence posture and stabilising assumptions underpinning the Alliance’s integrated command and force-planning framework.

Beyond budgetary allocations, the NDAA indirectly reinforces NATO’s operational credibility by anchoring the U.S. leadership role within the Alliance. The maintenance of U.S. forward forces underwrites the dual-hatted role of SACEUR, ensuring coherence between U.S. European Command and NATO’s command structure at SHAPE — a critical enabler for crisis response, reinforcement, and collective defence execution.

Strategically, the FY2026 NDAA establishes a stable baseline ahead of the NATO Summit in Ankara 2026, shaping Allied expectations on deterrence posture, burden-sharing, and longer-term force adaptation in an increasingly contested security environment.

Pillar 3: NATO–EU Cooperation

3.1 Military Mobility Moves Back to the Centre of NATO–EU Coordination

Military mobility has moved back to the centre of NATO–EU coordination — not as a technical policy file, but as a determinant of reinforcement credibility under pressure. As deterrence and sustainment timelines tighten, the ability to move forces, equipment, and logistics across Europe is increasingly treated as a strategic variable rather than a background enabler.

This recalibration was reflected in an informal exchange between the North Atlantic Council and the EU’s Political and Security Committee, convened on 17 December 2025 at Egmont Palace in Brussels. The discussion signalled a shift from declaratory cooperation toward coordination focused on execution under operational timelines.

The renewed attention to military mobility highlights how NATO and EU efforts are increasingly assessed against delivery rather than intent. NATO’s work on reinforcement and sustainment intersects with EU initiatives aimed at reducing regulatory and infrastructural friction, placing mobility at the core of practical NATO–EU complementarity.

Taken together, the NAC–PSC exchange points to a phase in which NATO–EU cooperation under the Cooperative Security framework is measured by speed, predictability, and reliability — not by statements or new political commitments.

Pillar 4: Southern Neighbourhood Partnerships

4.1 NATO’s Military Chief Heads to Baghdad — Here’s Why It Matters

The visit of NATO’s Military Committee Chair, Admiral Giuseppe Cavo Dragone, to NATO Mission Iraq in Baghdad this week was not routine. Travel at CMC level is typically reserved for moments where military oversight, political sensitivity, and questions of mission calibration converge — a space Iraq continues to occupy within NATO’s external engagement map.

NATO Mission Iraq operates under a non-combat mandate centred on defence capacity-building, training, and advisory support, aimed at improving the effectiveness, governance, and interoperability of Iraqi security institutions. The model is incremental by design, prioritising institutional resilience and standardisation rather than immediate operational effects. The CMC’s presence places renewed attention on how this advisory instrument fits within NATO’s current prioritisation framework, as Alliance focus remains concentrated on deterrence closer to home.

The regional context adds further weight. Iraq sits at the intersection of several strategic fault lines — bordering Iran to the east, exposed to residual terrorist networks, and linked northward to Türkiye, where NATO’s southern flank meets Middle Eastern instability. In this setting, NMI functions less as a counter-terrorism tool in itself than as part of a broader partnership-based security architecture.

The visit also coincides with continued U.S. congressional attention to Iraq within defence and counter-ISIS frameworks, reinforcing a sense of managed continuity across transatlantic policy tracks. Taken together, the CMC’s engagement points to ongoing scrutiny rather than renewed ambition — how advisory missions perform under constraint, where their limits lie, and how they fit NATO’s evolving approach to the Southern Neighbourhood.

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Closing Note

Thank you for reading and for engaging with Diplomatic Compass. The next edition will return in early January, looking ahead to the priorities and pressure points likely to shape the opening phase of 2026.