Joint Expeditionary Force (Maritime) (or JEF (M)) (formerly Response Force Task Group (RFTG)), is the Royal Navy's expeditionary task force maintained at high-readiness and available at short notice to respond to unexpected global events. In addition to the Royal Navy and the Royal Marines, the RFTG also includes elements of the British Army and the Royal Air Force. While it is primarily poised to conduct war-fighting or amphibious operations, the JEF(M) is capable of undertaking a diverse range of activities such as evacuation operations, disaster relief or humanitarian aid.