The Royal Marines, also known as the Royal Marines Commandos, and officially as the Corps of Royal Marines, are the United Kingdom's amphibious special operations capable commando force, one of the five fighting arms of the Royal Navy, and provide a company strength unit to the Special Forces Support Group (SFSG). The Royal Marines trace their origins back to the formation of the "Duke of York and Albany's maritime regiment of Foot" on 28 October 1664, and the first Royal Marines Commando unit was formed at Deal in Kent on 14 February 1942 and designated "The Royal Marine Commando".

Plymouth is a port city and unitary authority in Devon, South West England. It is located on Devon's south coast between the rivers Plym and Tamar, about 36 miles (58 km) southwest of Exeter and 193 miles (311 km) southwest of London. It is the most populous city south of London.