After the end of the World War I the plans for an enlargement were put on ice and in 1925 the work stopped, only to begin again during the World War II. Härnösand became the station for a Coastal Artillery Regiment. At Hemsön the construction of a battery situated on Storråberget, consisting of three twin 15,2 cm cannons began in 1953. At Havstoudd the construction of a battery of light artillery with 7,5 cm cannon (model 57) was carried out in 1960.