Joint Expeditionary Force
| Joint Expeditionary Force | |
|---|---|
| The JEF consists of personnel and equipment from all branches of the armed forces | |
| Active | 2014–present | 
| Countries | |
| Type | Expeditionary force | 
| Role | Military operations | 
| Size | 10,000 | 
| UK Components | Royal Navy Royal Marines British Army Royal Air Force | 
| Insignia | |
| Emblem | |
The Joint Expeditionary Force (JEF) is a United Kingdom-led Northern European multi-national military partnership designed for rapid response and expeditionary operations. It consists of the United Kingdom, the Nordic countries (Denmark, Finland, Iceland, Norway, Sweden), the Baltic states (Estonia, Latvia, Lithuania), and the Netherlands.
The JEF has been fully operational since June 2018. It can act independently in its own right, but it can also be deployed in support of NATO or other cooperative ventures, for example as part of a United Nations peacekeeping force. All of its ten member states are also members of NATO, with Finland's and Sweden's applications ratified in 2023 and 2024, respectively.