Fredrikshald Borgerväpning is a museum that focuses on preserving and communicating the history of Halden's civic militia, a military unit that existed from 1644 to 1881. The museum aims to bring this part of local history to life through various activities and events. It actively participates in historical markets, such as UDDA's historical market, and collaborates with the City Museum to offer activities in connection with the start of school week.
In addition to being a museum, Fredrikshald Borgerväpning includes volunteer civic militia groups that contribute to events and historical reconstructions, such as the events surrounding Charles XII's attack. The museum also organizes military music experiences and marches, which gives visitors an opportunity to experience history in a vivid way. The association has a mission statement that emphasizes independence and freedom, which is reflected in their activities and involvement in the local community.