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Defence & Security3 Nov 2026 · about 6 min

In Poland, the 'Coalition of the Willing' holds first large-scale military exercise

The brief

The Coalition of the Willing is a multinational alliance formed after nearly two years of meetings and summits. It includes 36 nations and is led by France and the United Kingdom. Its purpose is to move from planning to practical military preparation for Ukraine’s future security. The alliance’s first exercise, called “Koalicja,” will take place in Nowa Deba, southeastern Poland. Nearly 2,800 soldiers from 10 countries are expected to participate. The exercise is designed to test whether the coalition can deploy in Ukraine once fighting between Kyiv and Russia ends. This matters because the coalition wants to establish an intervention force that could deter Moscow from restarting hostilities. The United States is not part of the initiative, and its role in future security guarantees remains uncertain. That makes the coalition’s ability to demonstrate credibility especially important.

01

What is the 'Coalition of the Willing' in this event?

The Coalition of the Willing is a multinational alliance formed after nearly two years of meetings and summits. It includes 36 nations and is led by France and the United Kingdom. Its purpose is to move from planning to practical military preparation for Ukraine’s future security.

The alliance’s first exercise, called “Koalicja,” will take place in Nowa Deba, southeastern Poland. Nearly 2,800 soldiers from 10 countries are expected to participate. The exercise is designed to test whether the coalition can deploy in Ukraine once fighting between Kyiv and Russia ends.

This matters because the coalition wants to establish an intervention force that could deter Moscow from restarting hostilities. The United States is not part of the initiative, and its role in future security guarantees remains uncertain. That makes the coalition’s ability to demonstrate credibility especially important.

02

What military exercise is taking place in Nowa Deba, Poland, and what is it designed to test?

“Koalicja,” meaning “coalition” in Polish, is the first military exercise organized by this 36-nation alliance. It is scheduled to begin on November 9 in Nowa Deba, in southeastern Poland, near Ukraine’s border. The exercise is planned to continue until November 22.

Its central test is practical rather than symbolic. The exercise will examine the alliance’s ability to deploy forces in Ukraine once the fighting between Kyiv and Russia has ended. Nearly 2,800 soldiers from 10 countries are expected to take part. The scenario focuses on readiness and coordination, not a dramatic display of heavy weapons.

The exercise is intended to demonstrate military credibility. The coalition hopes that a credible intervention force could deter Moscow from resuming hostilities. Organizers are therefore testing whether participating countries can work together before any possible future deployment, while the United States remains outside the initiative.

03

How many countries and soldiers are expected to take part in the exercise?

Three different figures describe the exercise’s scale. The broader Coalition of the Willing consists of 36 nations. For the first “Koalicja” exercise, however, troops are expected from 10 countries, with nearly 2,800 soldiers deployed in the region bordering Ukraine.

France and the United Kingdom are the main contributors. They are joined by Estonia, Lithuania, Germany, the Netherlands, Spain, Sweden and Belgium. Together, these countries provide the personnel for the exercise, while the wider alliance includes additional nations not listed as sending troops for this first event.

The scale is large enough to test multinational coordination but is not presented as a major show of force. The article specifically says observers should not expect tanks and missiles. Instead, the exercise is meant to demonstrate that the alliance could organize and deploy a credible intervention force if fighting ends.

04

Why are France and the United Kingdom leading the exercise, and which other countries are contributing troops?

France and the United Kingdom lead the Coalition of the Willing, and they are also identified as the main contributors to its first exercise. The article does not give a separate political or military reason for their leadership. It establishes their role through the coalition’s structure and their expected troop contributions.

The other contributing countries are Estonia, Lithuania, Germany, the Netherlands, Spain, Sweden and Belgium. Alongside France and the United Kingdom, these eight countries make up the 10 nations expected to deploy nearly 2,800 soldiers for the exercise in the region bordering Ukraine.

Their participation gives the exercise a genuinely multinational character. The countries are testing whether they can support a future intervention force, rather than simply staging a weapons display. The exercise is intended to show that the alliance can coordinate enough military capability to deter renewed hostilities.

05

What could this coalition do in Ukraine after the fighting ends, and how might its presence deter Russia from restarting the war?

After fighting between Kyiv and Russia ends, the Coalition of the Willing aims to deploy an intervention force in Ukraine. The planned force is meant to provide a visible, organized military presence and support future security arrangements. Its intended role is linked to preventing a return to war.

The “Koalicja” exercise tests the mechanism behind that plan. Nearly 2,800 soldiers from 10 countries will practice the ability to deploy near Ukraine. If the alliance can demonstrate that its members are prepared to act together, that military credibility could deter Moscow from resuming hostilities.

The article presents this as a major challenge, not an accomplished result. The United States is outside the initiative, and its involvement in Ukraine’s future security guarantees is uncertain. The exercise therefore serves as an early test of whether the coalition can build enough credibility to support its proposed intervention force.

06

Why is the United States' absence important to the coalition's ability to provide security guarantees for Ukraine?

The United States’ absence matters because the coalition is trying to create future security guarantees for Ukraine without American participation in the initiative. The article also says US involvement in those guarantees remains highly uncertain. This leaves an important question about how much support the proposed arrangement would ultimately have.

The coalition is responding by testing its own ability to act. France and the United Kingdom lead the effort, while eight other countries contribute troops to the first exercise. Nearly 2,800 soldiers are expected to practice deployment in the region bordering Ukraine, creating a practical demonstration of multinational readiness.

The exercise cannot resolve the uncertainty surrounding the United States. It can, however, show whether the European-led alliance can build military credibility independently. That credibility is central to the coalition’s plan to deter Moscow from restarting hostilities after the fighting ends, although the article gives no final guarantee that the plan will succeed.

07

What is collective security, and how do multinational military forces use deterrence to prevent conflict?

Collective security is the idea that countries protect one another through a shared commitment. A threat to one member is treated as a concern for the wider group. The aim is to prevent conflict before it begins, rather than respond only after violence has escalated. This general definition is not explained in the article but is established security terminology.

Multinational forces support collective security through deterrence. They coordinate personnel, plans and military capabilities, then demonstrate that they can act together. In this case, the “Koalicja” exercise lets 10 countries practice deployment near Ukraine. That practical readiness is meant to make the alliance’s commitment credible.

The article connects this mechanism to a possible future intervention force in Ukraine. A credible multinational presence could discourage Moscow from resuming hostilities after fighting ends. The exercise is therefore testing both cooperation and military credibility, while the United States’ role in future guarantees remains uncertain.

This brief was written by AI from the original reporting and checked by other models. Names, figures and quotes come from the source; read it for full context.

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