 Carlsten no longer had outposts, and after strong bombardment from all sides, finally surrendered on 23 July, with the condition that the commander along with his men would be sent to Värmland.After taking Carlsten, Gyldenløve installed a strong detachment of troops under Løvenhjelm to defend Marstrand before returning to Norway.Through the conquest of Marstrand Denmark obtained a safe, ice-free harbour.