# On Bulgaria's roads, NATO flexes its southeastern flank > Introduction: convoys telling the story of an alliance in motion - Author: Maxime Marquette - Publisher: MadMax (https://mad-max.co) - Section: Profile - Published: 2026-07-04 - Canonical URL: https://mad-max.co/en/article/sur-les-routes-bulgares-lotan-muscle-son-flanc-sud-est ## Introduction: convoys telling the story of an alliance in motion ### A military road between two countries From **June 27** until **July 12**, **French** and **Polish** troops and equipment are using **Bulgaria's** road network to link **Romania** to the **Novo Selo** training ground in southeastern Bulgaria. This is not a minor logistical detail: it is the concrete manifestation of a NATO exercise named **Alliance Wall**, an operation testing the Alliance's ability to rapidly move forces across several national borders. **Bulgarian authorities** confirmed these movements would be overseen by **military police**, with convoys traveling on a **precise schedule** between the two **strategic points**, according to information relayed by the **BTA** news agency. ### Why this exercise matters Amid **persistent tensions** with Russia and a prolonged war in Ukraine, every **military mobility** exercise across Eastern Europe takes on particular significance. The ability to rapidly move **troops** and **heavy equipment** from one member country to another, without excessive bureaucratic friction, has become a **credibility test** for all of NATO. **Bulgaria**, sometimes a quiet member of the Alliance, thus finds itself at the center of an exercise that concretely illustrates what **collective solidarity** means in the face of a potential threat from the East. *I'll say it plainly: seeing French and Polish soldiers cross Bulgaria to train together is exactly the kind of image that should reassure anyone worried about a softened Atlantic Alliance. This isn't hollow symbolism — these are trucks, closed roads, real logistics.* ## The route of exercise Alliance Wall ### From Romania to Novo Selo According to Bulgarian outlet **Fakti.bg**, the planned route runs from **Romania** through Bulgaria to the **Novo Selo training ground**, before returning along the same corridor. This logistical loop, scheduled to run until **July 12**, mobilizes military vehicles, heavy equipment, and uniformed personnel, visible on the country's major highways. The choice of **Novo Selo** is no accident: this Bulgarian **training ground** is regularly used for **multinational exercises**, notably those involving **American forces** temporarily stationed in the region, making it a familiar **anchor point** for NATO coordination in the Balkans. ### Coordination with local military police Bulgarian authorities specified that **foreign convoys** would be escorted by the **national military police**, a standard security measure that also underscores the operation's logistical scale. This type of escort aims to limit **disruptions** to the civilian road network while ensuring the **security** of the movement of **sensitive equipment**. This level of coordination between foreign forces and Bulgarian local authorities demonstrates an **administrative interoperability** that isn't always a given between countries with different military systems. *This kind of logistical detail — escorts, schedules, fixed corridors — impresses me more than any speech about Western solidarity. Well-oiled military bureaucracy is often the best indicator that an alliance is actually working.* ## CWIX 2026: the technological prelude to Alliance Wall ### An unprecedented interoperability exercise This mobility exercise comes shortly after the conclusion of the **Coalition Warrior Interoperability Exercise 2026**, better known by its acronym **CWIX**, held from **June 8 to 26, 2026** at NATO's **Joint Force Training Centre** in **Bydgoszcz**, Poland. According to reported figures, this exercise gathered roughly **4,000 participants** from **41 to 46 nations**, testing more than **500 digital systems** spread across some twenty thematic domains. The number of tests conducted, ranging from **25,000 to more than 40,000** depending on the source, makes it the **largest interoperability exercise** ever organized by the Atlantic Alliance to date, a figure that gives a sense of the **technical coordination effort** undertaken. ### Why technology comes before the field The sequence between **CWIX** and **Alliance Wall** is no scheduling coincidence. Before physically moving troops across borders, NATO first validated that **communication systems**, command, and coordination between member countries actually work together. This is the very logic of **modern coalition warfare**: without **digital compatibility**, **physical mobility** loses much of its effectiveness. This methodical sequence — technology first, then the field — illustrates **rigorous military planning** rather than surface-level improvisation. *I sincerely believe this kind of technical exercise, invisible to the general public, is worth more than plenty of diplomatic summits. It's the plumbing of collective defense, and plumbing that works saves lives in a real crisis.* ## NATO's southeastern flank, a strategic priority ### The Black Sea as a new axis of vigilance **Romania** and **Bulgaria** now form a strategic corridor along NATO's **southeastern flank**, a region that has grown in importance since Russia's invasion of Ukraine and the increased militarization of the **Black Sea**. The **transport infrastructure** connecting these two countries is now considered a set of **priority corridors** for the **rapid deployment** of allied forces, according to regional analyses. This priority placed on the region isn't new, but it has **intensified** as the war in Ukraine has dragged on, a reminder that European security isn't playing out only on the Ukrainian front, but also on its immediate margins. ### A high-level visit at the right moment The timing of this exercise coincides with a **strategic visit** to Bulgaria by the head of NATO's European command, according to information relayed by the Bulgarian press. This kind of **high-ranking visit**, occurring at the very moment foreign troops are crossing national territory, sends a **clear signal**: the region is not being left to fend for itself amid persistent **geopolitical uncertainties**. The convergence between a diplomatic visit and a concrete military exercise reinforces the **strategic clarity** of the message sent to Moscow. *I think this combination — a general visiting, troops rolling — is exactly what's needed to deter without needlessly provoking. It's calm firmness, not gratuitous escalation, and it's precisely the tone the West needs to hold.* ## What this means for Western deterrence posture ### A deterrence built in the details **Military deterrence** doesn't rest solely on spectacular weapons or thunderous declarations. It is also built, patiently, through exercises like **Alliance Wall**, which demonstrate the Alliance's real capacity to rapidly mobilize troops from multiple nations onto a shared theater. It is this kind of **concrete demonstration**, more than any speech, that matters in the eyes of a **potential adversary** assessing opposing capabilities. Every convoy that actually crosses a border, every digital system that genuinely works between allies, strengthens the **operational credibility** of the Atlantic Alliance as a whole. ### Washington's role in this reinforced posture Under the **Trump** administration, pressure on European allies to raise defense spending has been constant and sometimes rough in tone. But it must be acknowledged that this pressure has coincided with a **tangible strengthening** of Europe's military posture, including large-scale exercises like the one currently underway in Bulgaria and Romania. Whether or not one appreciates the style of current **American diplomacy**, the **firmness on defense budgets** has produced **concrete results** on the ground, visible in this kind of large-scale allied coordination. *I'm not one to excuse everything Trump does — far from it. But on this specific point, the pressure for Europe to pay more toward its own defense has paid off, and this Bulgarian convoy is tangible proof of that, not just a campaign promise.* ## Bulgarians facing these military convoys ### A normalized foreign military presence For **Bulgarian citizens** living along the routes used by these convoys, the presence of foreign military vehicles, overseen by national military police, has become something of a routine tied to the country's NATO membership. This kind of exercise, repeated over the years, has gradually **normalized** the **presence of allied forces** on Bulgarian territory. This normalization, however, doesn't erase legitimate questions about the temporary **road disruptions** this kind of movement can cause for daily civilian traffic. ### Popular support with caveats Public support in Bulgaria for an increased foreign military presence is not unanimous, and some local political currents remain more reserved about too strong an alignment with NATO priorities. This nuance deserves mention: **Atlantic solidarity**, seen from Sofia, isn't perceived with the same unanimity as in other **Western European capitals**. It would be dishonest to present this military cooperation as enjoying total consensus within Bulgarian society. *I want to say this clearly: I'm not claiming every Bulgarian applauds these convoys. But the strength of an alliance isn't measured by unanimous public opinion — it's measured by governments' ability to honor their collective commitments, even when it isn't popular.* ## Lessons for the future of European military mobility ### Toward a more fluid military Europe One of NATO's major projects for several years now concerns **military mobility** across the European Union: simplifying customs procedures, harmonizing road and rail infrastructure, and reducing the administrative delays that slow troop movement in a real crisis. Exercise Alliance Wall is a **full-scale test** of these harmonization efforts. Every successful exercise of this kind feeds the **lessons learned** needed to identify the logistical **bottlenecks** still present between **member countries**. ### A model to replicate elsewhere on the continent If this exercise proceeds without major incident through **July 12**, it could serve as a model for other strategic corridors in Europe, notably in the Baltic region, where similar concerns about the speed of allied force deployment against a potential threat are regularly raised by defense analysts. **Replicating** this kind of exercise elsewhere in Europe would send an additional signal of the Alliance's **geographic cohesion**, from the **north to the southeast** of the continent. *What strikes me is that these exercises are rarely told the way they should be. There's a lot of talk about summits and communiqués, very little about trucks actually rolling from one country to another. Yet it's those trucks that prove an alliance truly exists.* ## The precedent of the Steadfast and Dragon exercises ### A tradition of allied training in Eastern Europe Exercise **Alliance Wall** didn't appear out of nowhere: it fits into a long tradition of allied exercises conducted in Eastern Europe over several years, such as the **Steadfast Defender** and **Dragon** series, which have already tested NATO's ability to rapidly mobilize tens of thousands of soldiers across the continent. These precedents helped identify **real logistical gaps**, later corrected in subsequent exercises. Each new exercise thus builds on the **lessons learned** from previous ones, following a logic of continuous improvement rather than symbolic repetition. ### A deliberate strategic continuity This continuity between successive exercises demonstrates that the **Western deterrence** posture doesn't rest on isolated flashy moves, but on repeated, methodical training. It is this repetition, more than the one-off scale of any single exercise, that builds genuine, lasting operational capacity for the Alliance as a whole. The link between **Alliance Wall** and these earlier exercises illustrates a coherent military doctrine, built over several years rather than improvised in a single summer. *I find it reassuring that these exercises aren't isolated media stunts, but the continuation of work started years ago. It's exactly this kind of consistency, unglamorous but rigorous, that builds real deterrence.* ## Conclusion: a demonstration of solidity more than spectacle ### What this testimony leaves us with The Franco-Polish convoy crossing Bulgaria through **July 12**, as part of exercise **Alliance Wall**, illustrates a simple but essential reality: NATO continues to test, concretely and regularly, its ability to move forces across its internal borders. Combined with the impressive results of **CWIX 2026** in Bydgoszcz, this exercise paints the portrait of an Alliance investing in the practical foundations of its **military credibility**. ### Vigilance that must continue Nothing guarantees these efforts will be enough against every **future threat**, but they represent a **concrete step** in the right direction for a Europe that long **underinvested** in its own collective defense. Vigilance and preparation, demonstrated road after road, exercise after exercise, remain the best response to an unstable regional neighborhood. *Closing this testimony, I keep one simple image: trucks rolling, escorted, calmly, across European borders. It's understated, but that's exactly what the solidity of an alliance that keeps its commitments looks like.* **By Maxime Marquette, columnist** ## Columnist's transparency note ### Editorial stance I am not a journalist but a **columnist and analyst**. My expertise lies in observing and analysing the geopolitical, economic and strategic dynamics that shape our world. My work is to take political strategies apart, to understand global economic movements, to put the decisions of international actors in context and to offer analytical perspectives on the changes that are redefining our societies. I do not claim the cold objectivity of traditional journalism, which stops at reporting facts. **I claim analytical clarity**, rigorous interpretation and a deep understanding of the complex issues that concern us all. My role is to give meaning to the facts, to place them in their historical and strategic context, and to offer a critical reading of events. ### Method and sources This text keeps the basic distinction between **verified facts and interpretive analysis**. The rule never changes: a factual claim is published only when a verifiable source supports it, and the sources this article actually used are listed under **Sources**, never here. **Primary source families** used by the publication, when the story has them: official statements from governments and international institutions, public statements by political leaders, reports from intergovernmental organisations, dispatches from recognised international news agencies. **Secondary source families**: specialised publications, internationally recognised news media, analyses from established research institutions, reports from industry organisations. When an article cites statistical, economic or geopolitical data, it comes from the institutions that produce it (intergovernmental organisations, central banks, national statistics offices), and the exact institution is named under **Sources**. ### Nature of the analysis The analyses, interpretations and perspectives in the analytical sections of this article are a **critical, contextual synthesis** based on the information available, the trends observed and the expert comments cited in the sources consulted. My role is to interpret these facts, to set them in the context of today's geopolitical and economic dynamics, and to give them a coherent meaning within the larger story of the changes shaping our time. These analyses reflect expertise built through continuous observation of international affairs and an understanding of the strategic mechanisms that drive global actors. This article describes a documented state of affairs on its publication date, not a prediction: later developments may shift its outlook. No update is promised in advance; when an article is corrected or completed, the change is dated in the text. ## Sources ### Primary sources - [Military personnel, equipment to use Bulgaria's national road network for NATO exercise — BTA, June 27, 2026](https://www.bta.bg/en/news/1156485-military-personnel-equipment-to-use-bulgaria-s-national-road-network-for-nato-e) - [Through July 12, foreign troops will move from Romania to Novo Selo — Fakti.bg, June 2026](https://fakti.bg/en/bulgaria/1063842-do-12-uli-ot-rumania-do-poligon-novo-selo-i-obratno-shte-se-pridvijvat-chujdestranni-voennoslujeshti-za-uchastie-v-uchenie) - [NATO's Europe chief continues his key visit to Bulgaria — Fakti.bg, June 2026](https://fakti.bg/en/bulgaria/1064863-nato-s-europe-chief-continues-his-key-visit-to-bulgaria) ### Secondary sources - [CWIX 2026: Interoperability in Action — UK Government, June 2026](https://www.gov.uk/government/news/cwix-2026-interoperability-in-action) - [NATO's largest interoperability exercise wraps up in Poland with 40,000 system tests — Polskie Radio, June 26, 2026](https://www.polskieradio.pl/395/7784/artykul/3701931,natos-largest-interoperability-exercise-wraps-up-in-poland-with-40000-system-tests) - [Bydgoszcz, a forge of NATO interoperability — Portal Kujawski, June 2026](https://portalkujawski.pl/2026/bydgoszcz-a-forge-of-nato-interoperability-the-alliance-aims-to-be-ready-for-anything/) --- Source: Maxime Marquette, MadMax. When citing, name the author and link https://mad-max.co/en/article/sur-les-routes-bulgares-lotan-muscle-son-flanc-sud-est