Finnish War

• 1. Introduction

  ›

  The Finnish War began on the 21st of February 1808, when 24,000 Russian troops crossed the Swedish-Russian border at Ahvenkoski. Within days, Helsinki had fallen. Within weeks, Turku and Vaasa were in Russian hands. By November of that year, Russia had overrun all of Finland. What followed was not merely a military defeat: it reshaped the map of northern Europe, ended a Swedish royal dynasty, and ultimately transformed one of Europe's most corrupt states into something quite different. How did Sweden lose a third of its territory in under two years? And what did that catastrophic loss leave behind?

• 2. Two Kings and a Treaty

  ›

  On the 24th of September 1807, Russian Emperor Alexander I sent a letter to Swedish King Gustav IV Adolf. The message was blunt: if Sweden wished to remain at peace with Russia, it would need to honor the terms of the Treaty of Tilsit, the agreement Alexander had concluded with Napoleon earlier that year. In practice, that meant cutting off trade with Britain and joining Napoleon's Continental System.

  Gustav IV Adolf regarded Napoleon as the Antichrist and Britain as his natural ally. The idea of strangling Swedish maritime commerce to please France was not just strategically unacceptable to him; it was almost theological. Rather than comply, he entered negotiations with Britain for a joint strike against Denmark, whose Norwegian possessions he coveted.

  Meanwhile, the Royal Navy attacked Copenhagen, and an Anglo-Russian war broke out. Alexander pressed Gustav to close the Baltic Sea to all foreign warships, repeating his demand on the 16th of November 1807. The king waited two months before replying that it was impossible to honor the old arrangements so long as France controlled the major Baltic ports. By the 8th of February 1808, Gustav had secured a formal alliance with Britain, and on the 30th of December 1807 Russia had already announced it would act if Sweden did not give a clear answer. The terms for war were fully set.

  In Saint Petersburg, Gustav's stubbornness was seen not as courage but as a convenient pretext. Pushing the Russian frontier west of the capital by occupying Finland would provide a valuable buffer against any future Swedish threat.

• 3. A Strategy Built on Illusions

  ›

  Most Swedish officers doubted their army could withstand the Imperial Russian Army, which was both larger and more experienced. Gustav Adolf held a strikingly different view of Sweden's defensive capability. His thinking shaped a strategy that was dangerously out of date.

  The Swedish plan assumed warfare during winter was effectively impossible, a belief already contradicted by recent conflicts. It also overlooked newly built roads into Finland that had reduced the country's dependence on naval support for large military operations. King Gustav thought defending Finland in winter was hopeless and chose to disregard repeated warnings of a Russian threat in early 1808, intending instead to hold the southern coast fortifications and retreat north, then counterattack in spring with naval support.

  Some Swedish officers wanted to act more aggressively. Lieutenant Colonel Samuel Möller advocated an immediate offensive. Gustaf Mauritz Armfelt proposed actively delaying the Russian advance in cooperation with the southern coast garrisons. The resulting orders given to General Wilhelm Mauritz Klingspor, the new Swedish commander in Finland, were an unresolved mixture of these competing approaches.

  The Russians prepared with considerably more rigor. Using spies and other intelligence sources, they produced maps of Finland that were in many respects more accurate than those held by the Swedes. General Georg Magnus Sprengtporten, drawing on his knowledge of Finland, recommended a winter offensive: with the seas frozen, Finland would be largely isolated. General Jan Pieter van Suchtelen refined those ideas before General Friedrich Wilhelm von Buxhoeveden was appointed commander of the Russian forces in December 1807. Gustav's failure to prepare adequate supplies was compounded by his fear that doing so might appear provocative to Russia.

• 4. The Fortress That Surrendered

  ›

  Sveaborg, known in Finnish as Suomenlinna, was the most formidable fortification Sweden held in Finland. Under Admiral Carl Olof Cronstedt, it had a garrison of 6,000 men, more than 700 cannons, and stores sufficient to last until the summer of 1808. Its defenses were strong enough that the Russians made no attempt to storm it.

  Instead the Russians laid a siege. After prolonged negotiations, Cronstedt and his council concluded that further resistance was futile, and on the 6th of May 1808 the fortress surrendered. The Russians received the main body of the Swedish archipelago fleet intact, together with large stores of supplies and munitions. It was a strategic windfall: control of the fleet gave Russia superiority in the narrow waters of the Finnish archipelago, where large ships of the line could not maneuver.

  The contrast with Svartholm was stark. That smaller fortress, commanded by Major Carl Magnus Gripenberg, held a garrison of 700 men but was badly neglected. Only a third of the men had functioning weapons. Most of the fortress guns lacked carriages. The wells were unusable and food and ammunition stores were inadequate. Gripenberg refused two Russian surrender demands before accepting negotiations on the 10th of March. Svartholm fell on the 18th of March after a siege of roughly a month, with only one man wounded in action.

  The fall of Sveaborg reverberated well beyond the immediate loss. Although a powerful explosion later destroyed several of the captured ships, the Russians used the guns salvaged from burned vessels to construct new fortifications at Hanko and along narrow passages leading to Turku.

• 5. Ice, Mutiny, and a King Dethroned

  ›

  By November 1808, Russia controlled all of Finland. On the 19th of November, the Convention of Olkijoki was signed and the Swedish army was compelled to leave Finnish territory. Alexander I wanted to press further, into Sweden proper, and Count Kamensky proposed a remarkable plan: cross the frozen Gulf of Bothnia at two points, with one force marching from Vaasa toward Umeå and another moving from Turku through Åland toward the vicinity of Stockholm, while a third unit advanced overland through Tornio.

  The new Russian commander, Bogdan von Knorring, considered the plan unrealistic and delayed. The tsar grew impatient and dispatched War Minister Arakcheyev to Finland to force Knorring into action.

  In Stockholm, the political situation had already reached a breaking point. On the 13th of March 1809, King Gustav IV Adolf was dethroned by a coup, blamed for the fatal mistakes that had led to the loss of Finland. His uncle was proclaimed Charles XIII of Sweden. Four days after the coup, Bagration's corps of 17,000 men occupied the Åland Islands. A Russian vanguard under Kulnev marched across the frozen sea and on the 19th of March reached the Swedish shore within 70 kilometers of Stockholm.

  The new Swedish king immediately sent envoys to Knorring proposing a truce. Knorring agreed and recalled Kulnev from the Swedish shore. Meanwhile, 5,000 Russian troops under Barclay de Tolly completed a grueling crossing further north and entered Umeå on the 24th of March. A third force under Count Shuvalov encircled a Swedish army at Tornio, which capitulated on the 25th of March. The tsar himself arrived in Turku on the 31st of March, revoked Knorring's signature on the truce, and named Barclay de Tolly the new commander-in-chief. Hostilities resumed.

• 6. The Royal Navy's Last Act

  ›

  Admiral James Saumarez brought a British Royal Navy fleet to Sweden in May 1809, concentrating 10 ships of the line and 17 smaller vessels in the Gulf of Finland. British naval power hemmed the Russian battlefleet inside Kronstadt harbor. After the British installed artillery batteries at the Porkkala cape, they cut the coastal sea route for Russian ships entirely.

  This blockade stretched Russian logistics severely. Maintaining supply lines required sizable garrisons posted all along the Finnish coast. Before the Royal Navy withdrew from the Baltic Sea on the 28th of September 1809, it had captured 35 Russian ships and burned 20 others.

  Earlier in the war, on the 25th of August 1808, two British ships of the line, HMS Implacable and Centaur, had joined the Swedish fleet and moved to engage the Russian squadron under Admiral Pyotr Khanykov. The Russian fleet, consisting of nine ships of the line and several frigates, turned and attempted to reach Baltiyskiy Port. The British ships, superior in sailing ability, pursued and disabled the last Russian ship of the line before capturing and burning it. Further Royal Navy reinforcements, including HMS Victory, Mars, Goliath, and Africa, arrived to maintain a blockade of Baltiyskiy Port until the sea froze.

  Despite this naval partnership, Swedish land operations in the final phase faltered. In August 1809, Charles XIII ordered General Gustav Wachtmeister to land in northern Sweden and strike at Kamensky's rear. Engagements at Sävar and Ratan proved inconclusive, and Kamensky neutralized the counteroffensive with a final victory at Piteå.

• 7. Peace and Its Aftermath

  ›

  The Treaty of Fredrikshamn, signed on the 17th of September 1809, ended the war. Sweden ceded the whole of Finland and all territories east of the Torne river to Russia, including the north-eastern parts of what was then Västerbotten, the region today called Norrbotten. Sweden then joined the Continental System and closed its harbors to British ships, which produced a formal British declaration of war against Sweden. On the 6th of January 1810, Russia mediated a Treaty of Paris between Sweden and France.

  Russia organized the ceded territory as the Grand Duchy of Finland, retaining the Gustavian constitution of 1772 with minor modifications. In 1812, Russia attached the areas it had taken from Sweden in the 18th century, known as Old Finland, to the new Grand Duchy. That constitution remained in force in Finland until 1919. Almost all Finnish soldiers serving in Sweden, most of them concentrated near Umeå, were repatriated after the peace.

  The coup that removed Gustav IV Adolf also changed the Swedish royal succession permanently. The House of Bernadotte, the dynasty descended from French Marshal Jean-Baptiste Bernadotte who had commanded the joint invasion force in Denmark during the war, became Sweden's new royal house in 1818. A new Swedish constitution was adopted in the wake of the war as well.

  According to two 2015 studies by political scientists Jan Teorell and Bo Rothstein, the loss triggered a decisive reform of Swedish governance. Sweden had been regarded as one of Europe's most corrupt countries before 1809. Defeat created a perception of an existential threat from the east and motivated Swedish elites to build a more effective, less corrupt state as protection against future Russian power.

• 8. Memory in Metal

  ›

  Finland marked the 200th anniversary of the war by minting a commemorative €100 coin in 2008. The coin's motif was the passage of Finland from Sweden to Russia: the reverse depicted the withdrawing Swedish crown representing the pre-war era, while the obverse showed the Russian eagle symbol representing the country's post-war future under Russian rule.

  Sweden chose a quieter form of commemoration. All Swedish 1 krona coins minted in 2009 carried a stylized image of sea and sky on the reverse, flanked by a line from Anton Rosell: Den underbara sagan om ett land på andra sidan havet, translated as "The wonderful story of a land on the other side of the sea." Both nations chose the same anniversary, the same medium, and arrived at images that faced in opposite directions.