The siege of Stralsund was an armed engagement between the Electorate of Brandenburg and the Swedish Empire from 20 September to 15 October 1678, during the Scanian War. After two days of bombardment on 10 and 11 October, the severely devastated Swedish fortress of Stralsund surrendered to the Brandenburgers. The remainder of Swedish Pomerania was taken by the end of the year, yet most of the province including Stralsund was returned to Sweden by the terms of the Treaty of Saint-Germain-en-Laye and the Peace of Lund, both concluded in 1679.