Example image of eyePlorer eyePlorer map for 'Fredriksten': Fortification Halden Norway Bohus Fortress Bohuslän List of Norwegian fortresses Sweden Treaty of Roskilde Frederick III of Denmark Investment (military) Northern War and Norway Akershus Fortress Oslo 1660 February 22 Glomma Hannibal Sehested (governor) Scandinavia Trøndelag Gyldenløve Akershus Fredrikstad Fredrikshald Scanian War De la Gardie Marstrand Jämtland Great Northern War and Norway Charles XII of Sweden Gudbrandsdal Østerdalen Basmo Fortress Kongsvinger 1716 March 8 Guerrilla warfare Scorched earth July 4 Battle of Dynekilen Peter Tordenskjold Svinesund July 12 December 8 December 11 Charles XIV John of Sweden Convention of Moss Vincens Budde November 30 Battle of Stäket Blaker Fortress
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