The All Arms Commando Course (AACC) lasts for 13 weeks and is run by the Royal Marines at the Commando Training Centre Royal Marines (CTCRM), Lympstone. Members from any of the United Kingdom's Regular Armed Forces (e.g. personnel from units attached to the Marines) and overseas exchange personnel can attend to serve with UK Commando Force (UKCF). On completion of the course the successful candidate earns the right to wear the green beret, and to wear the "Commando Dagger" on their uniform. The Royal Marines expect that nearly half of the volunteers will drop out or be dismissed before completing the AACC.[1][2][3] The primary aim of the course is to give service personnel the core military skills necessary for Extremely and Very High readiness Commando and Littoral Strike operations.
The course is open to both men and women. In 2002 Major Philippa Tattersall of the Adjutant General's Corps became the first woman to have successfully completed it.[4]