- Sweden after loosing a war after a war, made one more attempt to gain back the land areas, lost to the Russia. However the war from 1788 to 1790 didn't lead to any conclusion and both sides agreed, that it was a tie and the border remained, where it had remained since the unfortunate military adventure of the Swedish "hat party". This war however got the Russians convinced, that the current fortifications weren't sufficient to guard the South-East area of Finland and to block the way to St. Petersburg. The result from that conclusion was the double fortification of Ruotsinsalmi - Kyminlinna, where Kyminlinna fortress was defending the Kotka area from a land attack and the Ruotsinsalmi sea fortification (Fort Slava) defending against an attack, coming from the sea. 

- The several previous wars had proved that the delta area of Kyminjoki wasn't easily defendable if the enemy was able to move freely in the close by sea. This was the most important factor, when it was also decided to fortify the islands nearby of Kotka, along with the land fortification of Kyminlinna.

- The most powerful of these island fortifications was the fortification that was build to the island of Kukouri and later was named as Fort Slava, meaning a Fort of Honour. The fort was build into a circle form and it could fire to any direction with it's ninety cannons. The construction was started under the command of Aleksandr Suvorov in the year of 1791. The construction was really fast and in 1792 the fort was thought to be a completed, but it still took three years before the fort was officially named as a fort in 1795. However the internal disputes in Russia stopped the constructions which Suvorov had thought for Fort Slava. In the end not nearly all of the plans came true for Fort Slava, but that's just more of a rule than an exception in the fortifications that were build to the Finnish soil by the Swedes and Russians.

- After the war from 1808 to 1809, the border area was moved far away from Fort Slava and the fort was named as a second class fort, without any real importance. In 1835 the order from Tsar Nikolai I disbanded all of the fortifications in South-East Finland, but Fort Slava was an exception as there was still a garrison and it was maintained constantly, the place however wasn't on top of the list of the most wanted service places for the Russian officers. 

- The Crimean War was also the end for Fort Slava. At the start of the war, there was a garrison in the fort, but after the British and French fleet had destroyed the Bomarsund Fort in Åland and damaged or destroyed several Finnish cities, the order of emptying the fort came. The British fleet arrived on front of the fort on 15th of June 1855, firing several cannon shots towards the walls. As the fort didn't response, the British had to believe that the place was empty. The British landed to the fort and started to mine the fort. In the evening loud explosion was heard and the fort was surrounded into a dust cloud from the explosion. After the cloud disappeared, for everyone's amazement, the fort was still standing and hadn't suffered nearly any damage. Clearly there had been too few explosives and so the British left from the area.

- The British however came back and landed to the fort on 26th of July 1855. This time they didn't save the gun powder...

- The explosion that happened at 12pm, was enormous...Fort Slava was gone completely, only the round shape of the fort was visible where it once had stood.

- Even when the huge explosion destroyed the fort completely, there has been some renovation work done in the past years. The sector of the main gate, has been renovated, but otherwise the fort is mostly gone, just some picturesque still stands and stares to the sea, just like when the British finally left from the area. It's not a big island as can be seen from the picture, more like a scar.

- The area of the main gate. This is by far the most beautiful fort that Finland has. During it's more glorious days, it must have been a magnificent scene, as you can still see how massive it has been.