The camp was the base for the Army engineering regiment (Hærens ingeniørregiment). There were formerly a total of three military camps around Hønefoss: Hvalsmoen, Helgelandsmoen and Eggemoen.
The camp served as the headquarters for the Army engineering brigade (Hærens ingeniørbrigade). There were formerly a total of three military bases around Hønefoss: Hvalsmoen, Helgelandsmoen and Eggemoen.