[2] Roslagen Marine Regiment was raised in 1956 as the 1st Coastal Artillery Brigade (Första kustartilleribrigaden, KAB 1).

The brigade consisted initially in the war organization of a staff at Hamnholmen and two barrier battalions (spärrbataljoner) based in Arholma and Söderarm as well as local defence battalions.

It was because the Swedish Navy's naval base service units merged with the coastal artillery's brigade service units and was now part of the marine brigades.

On 1 January 1998, the war organization within the coastal artillery was reduced, whereby the Roslag Marine Brigade was reduced to a regiment, and received the new name Roslagen Marine Regiment (RMR).

[8] In 2017 (or 2018), the traditions were transferred to the Södertörn Group, this after the decision that the Home Guard battalions should bear the insignia of the 1st Marine Regiment (Amf 1) as a unit insignia.