British and European troops rehearsing a Ukraine peacekeeping force France UK mission would be allowed to fire back if Russian forces attacked them after a ceasefire. The issue is moving from paper planning to Exercise Koalicja in Poland, where 2,800 soldiers, sailors and aviators will drill how a rapid deployment could work.
Lt Gen Tom Bateman said the exercise was testing plans that have been in development for over a year and that the force was committed "to providing robust and binding security guarantees for Ukraine following a cessation of hostilities". He also described the force as "non-Nato", a point that sets the mission apart from the alliance structures that usually shape large military deployments in Europe.
Exercise Koalicja in Poland
Exercise Koalicja will take place later this month in Poland as an 11-country rehearsal of how European militaries could deploy rapidly to Ukraine if the war comes to an end. France is supplying 1,500 troops from its 1st Division, while Britain is supplying 300 troops from the 7th Light Mechanised Brigade. Poland, Germany, Belgium, Estonia, Lithuania, the Netherlands, Spain, Sweden and Turkey are also taking part.
The force is being rehearsed as an Anglo-French led stabilisation effort that would help Ukraine regenerate and strengthen its military after a war. Western troops are intended to deploy well away from the front, so the drill focuses on how they would move in, settle, and hold their posture if the ceasefire takes effect.
Rules for British troops
Western officials said the force would be "defensive in nature" and added, "Clearly we will protect our forces against any aggression". That means British troops and their European allies would not be passive if attacked in Ukraine; the planning assumes they could respond to Russian fire while still operating as peacekeepers after hostilities stop.
The practical question is not the label attached to the mission but the rules attached to it. A peacekeeping deployment that can answer fire would need clear command authority, rapid communications and a force posture that can move, protect itself and keep functioning even after first contact.
US systems and Starlink
The force is expected to have little to no US support if deployed into Ukraine, and one official said, "We are not dependent on US systems". That matters because the mission is being designed to function without leaning on US systems or technology such as Elon Musk’s Starlink, a constraint that will shape how European militaries communicate and coordinate in the field.
That same gap sits beside the wider political picture. Donald Trump has been part of the US role in the peace effort, and three-way talks are planned later this month, but the force being rehearsed here is meant to stand on its own if Europe has to provide security guarantees after a ceasefire.
The unanswered part is whether this proposed force will actually deploy to Ukraine after a ceasefire. For now, the concrete step is Exercise Koalicja: an 11-country, 2,800-person rehearsal for a mission that would be European in character, non-Nato in structure, and prepared to protect itself if attacked.
