The Åland Islands belonged to the provinces Sweden had to cede to Russia to become the semi-autonomous Grand duchy of Finland. When, by the treaty of Fredrikshamn in September 1809, the islands were ceded to Russia, the Swedes were unable to secure a provision that the islands should not be fortified. The question was, however, a vital one not only for Sweden but for Great Britain, whose trade in the Baltic was threatened.
In 1854, accordingly, during the Crimean War, an Anglo-French force attacked and destroyed the fortress of Bomarsund, against the erection of which Palmerston had protested without effect some twenty years previously. By the "Åland Convention," concluded between Great Britain, France and Russia on March 30 1856, it was stipulated that "the Aland Islands shall not be fortified, and that no military or naval establishments shall be maintained or created on them." By the 33rd article of the Treaty of Paris (1856) this convention, annexed to the final act, was given "the same force and validity as if it formed part thereof," Palmerston declaring in the House of Commons (May 6) that it had "placed a barrier between Russia and the north of Europe."
Some attention was attracted to this arrangement when in 1906 it was asserted that Russia, under pretext of stopping the smuggling of arms into Finland, was massing considerable naval and military forces at the islands. The question of the Åland Islands created some discussion in 1907 and 1908 in connexion with the new North Sea agreements, and undoubtedly Russia considered the convention of 1856 as rather humiliating. But it was plainly shown by other powers that they did not propose to regard it as modified or open to question, and the point was not definitely and officially raised.