fortress also had a psychological aspect, in that its mere existence kept a firm grip of peoples' minds—essentially functioning as a morale booster—during times when Sweden was in the shadow of war. Forts Degerberget Degerberget Fort () was planned and constructed on Degerberget Mountain, north of Boden and west of the lake Buddbyträsket, between 1900 and 1908. It was the only fort in the northern fort group as defined in the 1914 defensive plans for Boden Fortress. The main artillery consisted of four kanon m/99, backed up by another four kanon m/94-04 which were replaced by 8.4 cm kanon m/47 in the early 1950s. Surrounded by a caponier ditch on all sides, the fort area also features one observation post, two searchlight sites and two larger bunkers. Part of the Swedish gold reserve was kept here from 1941 to 1982. Degerberget Fort was decommissioned in 1992 together with Gammelängsberget Fort. Mjösjöberget Mjösjöberget Fort () was planned and constructed between 1900 and 1908. A part of the eastern fort group together with Gammelängsberget Fort, it was situated on Mjösjöberget Mountain to the east of Boden. As Rödberget Fort it was fitted with the fästningshaubits m/06 as main artillery, together with the standard secondary 8.4 cm cannon and tertiary caponier cannon. Since Rödberget Fort was refitted with new main artillery in the 1970s, Mjösjöberget Fort is the only to still feature 15 cm main artillery as it was decommissioned in 1979, some 20 years earlier than the other forts. Like the other two forts northeast of Boden, it is surrounded on all sides by a ditch. The fort also has a large bunker and two searchlight sites close by. Gammelängsberget Planned and constructed between 1900 and 1908, Gammelängsberget Fort () situated on Gammelängsberget Mountain east of Boden was the first of the five forts to be finished and the first to fire any guns when a test firing was conducted in 1907. It was part of the eastern fort group—together with the close by Mjösjöberget Fort—in the 1914 defensive plans. Just as on the other forts, the original secondary guns, 8.4 cm kanon m/94-04, were replaced by 8.4 cm kanon m/47 between 1950 and 1952. The main artillery, 12 cm kanon m/99, and the caponier artillery, 57 mm kaponjärkanon m/07, served with the fort until it was closed down in 1992. Gammelängsberget Fort is surrounded by a caponier ditch on all sides,