A large and, for most people, unknown treasure trove of Swedish music is hidden in the military archives. Today it is not only forgotten but also virtually inaccessible, and we risk losing a large and important part of our musical heritage. From the beginning of the 19th century until the middle of the last century, military musicians played a crucial role in Swedish musical life. Thanks to the music corps, many places around the country had a flourishing musical life and, alongside their service in the military, the musicians were of crucial importance to civilian musical life, where they often had a driving role. Many were also skilled composers who, in addition to marches and ceremonial music, also composed a lot of music for civilian contexts, from chamber music to orchestral works. By establishing a database of the archives and creating an overview of the sheet music preserved in them, as well as publishing a number of new freely downloadable sheet music editions from this rich material, Living Music Heritage/Kungl. Musikaliska Akademien in collaboration with Försvarsmusiken wants to make the music available to musicians, music students, concert organizers, researchers and the music-interested public. In this way, it becomes a natural and living part of today's modern concert repertoire.