Reichskreis
The Battle of Lutter (Lutter am Barenberge) took place during the Thirty Years' War, on 27 August 1626 (17 August 1626 in the old Julian calendar), between the forces of the Lower Saxon Circle, combining mostly Protestant states, and led by its Circle Colonel Christian IV of Denmark, and the forces of the Catholic League. Lutter am Barenberge lies to the south of the modern town of Salzgitter, then within the Imperial Circle of Lower Saxony, and now in northwest Germany.