Thousands of European troops will rehearse a deployment to Ukraine in case of peace. Western officials said the force would not take part in offensive operations.
Sky News reported British troops could fire back if attacked by Russian forces.
Why it matters: It shows how European states plan to back any future peace deal.
About 2,800 troops from 10 countries will train in southeastern Poland from Nov. 9 to 22. The force is led by Britain and France. Officials stress it would not take part in offensive operations.
Why it matters: It prepares a possible peacekeeping force after a ceasefire.