Battle of Furuholm The Battle of Furuholm was a naval battle that took place at Furuholm outside Strömstad on April 28 , 1808 as part of the Dano - Swedish War of 1808 - 1809 . Background . At the outbreak of war between Denmark - Norway and Sweden on 14 March 1808 , Commander Lorents Fisker had been appointed head of the naval defence of Norway . From the naval base at Gravningsundet in Hvaler , Fisker ' s task was to act as a hedge against Swedish movements by sea , at the same time as he were to support a possible offensive into Sweden . The short distances between Hvaler and the northern coast of Bohuslän quickly led to clashes between the naval forces , and since the Swedish naval officers had been ordered to seek battle against the Danish - Norwegian fleet the skirmishes became quite frequent . Raids around Strömstad . Several raids were also conducted by the Norwegians from their base at Gravningsundet , and during a reconnaissance mission outside Strømstad on the morning of 20 April , Fisker had sent a troop of sailors and infantry towards Seläters pier south of Svinesund under cover of darkness . This troop managed to capture 9 Swedish soldiers before they returned to the ships and went on to Strømstad , and after a demonstration of power in the sound between Furuholm and Killingholm , just a mile from the harbor , returned to Hvaler . On the morning of April 23 , a group of 100 Norwegian soldiers under the command of First Lieutenant Jochum Nicolay Müller , also managed to get ashore south of Sponvigen . From there they marched inland and captured 11 Swedish soldiers and 6 corporals , and confiscated some military equipment , before heading back to the ships . Battle . On 27 April , Fisker received reports that a small Swedish fleet had put into port at Strömstad , and decided to head out with 11 small gun yawls and 16 large gun sloops , hoping to surprise and destroy that part of the Swedish fleet . Captain G . H . Nordberg had arrived at Strömstad on 22 April with far fewer vessels than on the Norwegian side , but he had sent out vessels that guarded the coast and got a message from them that the Norwegian vessels had left Hvaler . This gave him time to prepare for a possible attack against Strömstad , so he ordered the creation of a land battery at Furuholm , which guarded the ( approximately ) 200 meters wide entrance to the harbour . Lorents Fisker began his attack on Strömstad on 28 April , but was met by Captain Nordberg and his five large gun sloops who pulled up to the middle of the entrance at Furuholm . The Swedes had chosen a good place to defend the entrance , and along with the land battery , they held out against the Danish - Norwegian fleet which in the narrow waters failed to exploit their numerical superiority . After an hour and a half of fighting the Norwegians had to withdraw with their damaged gun sloops and a loss of 7 killed and 4 severely wounded . The Swedish loss was 4 dead and 15 wounded ( However , it was alleged by the Norwegian author Constantius Flood that the Swedish losses may have been as high as between 30 – 40 dead and wounded ) . Aftermath . After the battle , Nordberg ' s fleet was reinforced with a two gun sloops and two smaller gun yawls , and on 2 May the fleet was enlarged with eight new gun sloops . These should be used as support during General Eberhard von Vegesack ' s planned offensive against Frederikshald following the Swedish left wing ' s invasion of Norway in early May . Parts of the Swedish fleet would nevertheless suffer defeat at the battle of Grævlingesund southeast of Hvaler in May .