The role of the Royal Marines Reserve (RMR) of the United Kingdom is to support the regular Royal Marines in times of war or national crisis. The RMR consists of some 600-1000 trained ranks distributed among the five RMR Centres within the UK. About 10 percent of the RMR are working with the Regular Corps on long-term attachments in all of the Royal Marines regular units.
All the volunteers within the RMR pass through the same rigorous commando course as the regulars. The former may be civilians with no previous military experience or men who transfer from the Territorial Army (the reserve component of the British Army) or are former regular Royal Marines.
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