40 Commando RM is a battalion-sized formation of the British Royal Marines and subordinate unit within 3 Commando Brigade, the principal Commando formation, under the Operational Command of Commander in Chief Fleet. Their barracks are at Norton Manor Camp, Norton Fitzwarren near Taunton in Somerset. All personnel will have completed the Commando course at the Commando Training Centre (CTCRM) at Lympstone in Devon, entitling them to wear the green beret, with attached personnel having completed the All Arms Commando Course.