The blueprint for a United European Army: personnel, costs, and command

Let’s imagine for a moment that just as there are 50 United States in a federation and a federal district, there existed a United States of Europe, composed of 27 countries, 28 militarily if the United Kingdom were to ally.

If the European Union were a single country and wanted to have an army proportional to its economic, population, and geostrategic weight, it could aspire to an armed force similar—though not identical—to powers like the United States, China, or Russia. In fact, the USE army would be the second-largest army in the world, after the American one.

What would that hypothetical army look like

Key data of the unified EU as a country in 2025 (approximate)

Population: 448 million compared to 342 USA and 1.400 China or 143 million Russia.

GDP: approximately 17 trillion dollars (USD) compared to 30 trillion USA, 20 trillion China, and two of Russia.

Surface area: about 4.2 million km²

Borders with conflictive or unstable countries: Russia, Middle East, North Africa.

Size of the armed forces

Active troops: 800,000 – 1,000,000 soldiers (similar to the USA)

Reservists: 1 to 1.5 million.

Balance between offensive capability, continental defense, and global deployment.

Annual military spending: approximately 300,000 or 400,000 million USD (about 2-2.5% of GDP, in the style of the USA or NATO). Currently, the combined spending of the 27 EU countries is around 270,000 million USD, but with redundancies.

Key strategic capabilities

Nuclear deterrence: It would inherit the arsenals of France (and eventually the United Kingdom if it returned), or integrate them under a common umbrella. It would need a triadic nuclear deterrence force (submarines, missiles, strategic aviation).

It would have a European Defense Staff with unified Command, possibly located in Brussels or Strasbourg.

Command regions like North (Baltic), East (Russian border), South (Mediterranean), West Africa (Sahel zone); and a common defense and security strategy (already outlined in the EU’s “Strategic Compass”).

Doctrinal and linguistic unification would be necessary, distribution of military industry among countries, although the necessary political will is currently very fragmented.

Would the EU be a military superpower?

Yes, if it achieves total integration in economic, industrial, and human terms it has the potential, but it lacks political unity, common doctrine, and centralized military leadership (for now).

In fact, it could become the second global military power after the USA if it built a serious common defense, with a total defense budget of $350,000 million USD annually, with a distribution proportional to national GDP (the fairest and most realistic way to distribute costs among countries), where, for example, Germany would contribute 28.2% of the total budget ($98.7 billion), France 18.8% ($65.8 billion) or Spain 10.6% ($37.0 billion).

Once you start working with data and figures, new questions arise, such as, for example, the military.

How much would it cost to pay the soldiers of a hypothetical European army?

The best-paying country for a private is Sweden, which pays between 1,800 and 2,100 euros per month, and the least is Romania, between 600 and 900 euros, but the cost is very different between both countries. Portugal, with its 900-1,100 euros, has a very high turnover of soldiers, and Spain has one of the lowest salaries in Western Europe: between 1,100 and 1,300 euros per month.

Thus, even maintaining local bonuses and differences, such as indirect benefits (housing, food, healthcare, pensions, transportation) that are not reflected in the base salary but increase the real value of the total compensation, to try to standardize (let’s think that bases and barracks would be by specialties, not by countries) the EU calculates an average salary cost per category of:

We are talking about a unified army not by the sum of countries, so an effective land military network for a unified European Union would require a distributed structure of barracks, logistics centers, training bases, and command posts, strategically distributed throughout the territory.

Depending on their specialization, we would need:

Permanent barracks: Bases where brigades or divisions are housed.

Logistics centers: Support for fuel, ammunition, health, and maintenance.

Maneuver fields: Areas for training with live fire and simulation (Canjuers, Drawsko).

Command and control centers: Operational coordination, NATO interoperability (SHAPE, Ulm, Reims).

Military schools: Training of officers and non-commissioned officers (Saint-Cyr, Toledo, Wiener Neustadt).

This depending on their specialization, by defense axes, would be:

Eastern Flank (NATO). Deterrence against Russia, rapid deployment. Rukla, Orzysz, Adazi, Novo Selo

Alpine-Mediterranean Axis. Defense of the southern EU, Balkan stability. Training centers in Persano, Larisa, Viator.

Baltic-Scandinavian. Arctic and Baltic Sea defense. Training centers in Boden, Tapa, Rovaniemi.

Central Europe. Rapid reaction, central logistics Training centers in Hammelburg, Mourmelon, Tancos.

Western Front. External projection (Africa), training centers in Canjuers, Córdoba, Lisbon.

We would have 5 or 6 huge European logistics and mobility centers:

Zaragoza (Spain). Air transport, logistics bridge.

Pápa (Hungary). NATO transport (C-17), strategic deployment.

Ulm (Germany). European transport/logistics command (JSEC).

Capellen (Luxembourg). Central logistics center of the EU.

Poland-Romania. NATO advanced prepositioning centers.

Barracks of a single European army

By NATO maneuvers experience – so far -, strategic plans, and even considerations of the EU’s own “Strategic Compass”, the barracks would be:

In Central Europe

Münster, Hammelburg, and Grafenwöhr in Germany. Infantry and armored training, NATO center, multinational training.

Bruchsal, Augustdorf in Germany. Armored units, logistics, rapid response.

Šiauliai, Rukla in Lithuania NATO forward presence battalions.

In Western Europe

Canjuers, Mailly-le-Camp, and Mourmelon in France. Armored brigades, artillery, heavy training.

Le Puy-en-Velay and Gap, in France. Mountain troops and airborne forces.

Cerro Muriano, in Córdoba. Mechanized and rapid intervention brigades.

Viator, in Almería. Light infantry, rapid deployment brigades.

Santa Margarida, Tancos in Portugal Mechanized Brigade and logistics.

In Baltic / North

Karlskoga, Skövde, Boden, in Sweden. Arctic training, mechanized brigades.

Rovaniemi, Kajaani, in Finland. Light forces and operations in extreme climates

Tapa in Estonia. Reinforced NATO presence (rotating forces).

Adazi in Latvia. NATO combat center, maneuvers, and training.

In Eastern Europe

Żagań, Orzysz, in Poland. Armored forces, NATO interoperability.

Miercurea Ciuc, Cincu, in Romania. Mountain troops, multinational training.

Novo Selo, in Bulgaria. U.S. and NATO presence, light maneuver force.

In Balkans / Southeast

Kumanovo, in North Macedonia. Regional cooperation, light forces training.

Larisa, Xanthi in Greece. Mechanized brigades, control of the Turkish axis.

Pinerolo, Persano, Capua in Italy. Light infantry, mountain, and airmobile brigades.

Udine, Gorizia, in Italy. Northeast command, Adriatic border.

What would an army not composed of a sum of armies allow us?

As a European army, not of the sum of European countries, this would allow us to:

Maintain 5-6 permanent army corps.

Provide rapid response in 3-5 days on any border.

Maintain up to 200,000 soldiers ready for immediate deployment.

Integrate territorial defense, external missions, and multinational deterrence.

To put it in context, Russia deployed approximately 150,000 soldiers around Ukraine, ready for invasion, adding about 22,000 more in areas like Donetsk and Luhansk. The EU army could double in forces and more than triple in firepower this attack.

Earlier this year, reports suggest that Russia maintains approximately 623,000 soldiers in combat in Ukraine, increasing by about 8,000 or 9,000 each month, according to El País, and around 120,000 Russian soldiers were concentrated on the Pokrovsk front during a specific offensive.

Opposite, Russia would face a European Army, with a Supreme European Defense Command (SEDC) headquartered in Brussels, responsible for the Joint Operational Command (JOC), which coordinates operations and deployments; the Support and Logistics Command (SLC); the Cyber Defense and Space Command (CDC), and the Special Forces Command (SFC) for strategic and counter-terrorism operations.

And a European Land Army (ELA) with approximately 750,000 active personnel plus 300,000 in reserve.

Divisions and support units of a single European army

Additionally, we would have 12 operational divisions plus support units:

Heavy Divisions (MBT and IFV). 4 divisions, each with:

2 armored brigades (Leopard 2A8/Leclerc).

1 mechanized brigade (IFV Puma, CV90, ASCOD).

Located in Div. 1: Magdeburg, Div. 2: Metz.

Div. 3: Zaragoza and Div. 4: Poznań.

Medium Divisions (8×8 and wheels). 4 divisions, each with:

2 mechanized infantry brigades on wheels (Patria AMV, VBCI, Boxer).

1 artillery support brigade.

Located in Div. 5: Turin, Div. 6: Bucharest, Div. 7: Helsinki and Div. 8: Lisbon.

Light / Rapid Deployment Divisions. Two divisions:

Paratrooper, airborne, and mountain infantry brigades.

With locations in Toulouse (Div. 9) and Sofia (Div. 10).

Specialized Divisions. Two divisions:

One of artillery and air defense (Prague).

One of engineers and heavy logistics (Rotterdam)

The European Union, even without a unified army, pursues the following levels of response:

RAP 1 (24h): two airborne brigades plus two rapid response brigades.

RAP 2 (72h): four brigades (mechanized/associates).

RAP 3 (7–30 days): rest of divisions.

Doctrine: integrated defense (land/air/sea/cyber), defense in depth, combined maneuver, intensive use of ISR and precision effects (MLRS, ATGM, joint fighter-bombers).