Södertörn Marine Regiment was raised in 1956 as the 3rd Coastal Artillery Brigade. The brigade was then in the peace organization under the Vaxholm Coastal Artillery Regiment, but was an independent unit in the war organization. The brigade consisted initially in the war organization of a staff at Järflotta and three barrier battalions, Ornö, Mellsten and Askö. On 1 July 1994, the brigade was also separated from the regiment in the peace organization and reorganized into the Södertörn Marine Brigade. The Södertörn Group was raised on 1 July 1994 as the Södertörn Marine Brigade, along with Roslagen Marine Brigade, and as a result of that the East Coast Naval Command was formed in 1990. This as a continuation of the integration of marine units on the lower level, including the coastal artillery brigades reorganized into marine brigades. With this, among other things, the Swedish Navy's base units and the coastal artillery's brigade service units were merged, and came to be part of the marine brigades. On 1 January 1998, the war organization within the coastal artillery was reduced, whereby Södertörn Marine Brigade was reduced to a regiment, and got the new name Södertörn Marine Regiment. The regiment was disbanded on 30 June 2000 in connection with the Defence Act of 2000.
2x defence district battalions of the Stockholm Defence District
Defence district engineer company, security companies and Home Guard units
Södertörn Marine Regiment
Staff at Järflotta
2nd Amphibian Battalion
Marine Service Battalion Södertörn
2x defence district battalions of the Stockholm Defence District
Defence district engineer company, security companies and Home Guard units
Heraldry and traditions
Coat of arms
The coat of arms of the Södertörn Marine Brigade 1994–1997 and Södertörn Marine Regiment 1997–2000. Blazon: "Per pale or the provincial badge of Södermanland, a griffon segreant sableand azure an anchor surmounted two gunbarrels of older pattern in saltire, all or".
Heritage
On 1 July 2000, the Södertörn Group was raised, consisting of two battalions, Södertörn Home Guard Battalion and Roslagen Home Guard Battalion. Södertörn Home Guard Battalion was the traditional keeper of the Södertörn Marine Brigade. In 2017, 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 as a unit insignia. The regiment's march was inherited by the Södertörn Group, which also took over the heraldic weapon, with the difference that the weapon was laid over two crossed swords.
