Assault Group Royal Marines (1AGRM) provides the Royal Marines expertise in small boat operations in support of littoral operations, both amphibious and riverine activitieshttp://www.royal-navy.mod.uk/server/show/nav.5363 1 Assault Group Royal Marines. It is based at Royal Marines Poole in Dorset and comprises a number of individual squadronshttp://www.royal-navy.mod.uk/server/show/nav.5361 Other Royal Marines Units.