Members of the Joint Expeditionary Force (JEF), a group of ten Northern European states led by the United Kingdom, invited Ukraine as an observer to their training in 2024 and 2025. Source: European Pravda, with reference to the joint statement of leaders of the member states of the Joint Expeditionary Force after the summit in Sweden Details: Heads of the JEF states have also condemned Russia's full-scale aggression against Ukraine, which they say has strengthened the importance of NATO and the