blockading Russian trade in the Gulf of Finland. Naval attacks on other ports, such as the ones in the island of Hogland in the Gulf of Finland, proved more successful. Additionally, allies conducted raids on less fortified sections of the Finnish coast. These battles are known in Finland as the Åland War. Russia depended on imports—both for its domestic economy and for the supply of its military forces: the blockade forced Russia to rely on more expensive overland shipments from Prussia. The blockade seriously undermined the Russian export economy and helped shorten the war. The burning of tar warehouses and ships led to international criticism, and in London the MP Thomas Gibson demanded in the House of Commons that the First Lord of the Admiralty explain "a system which carried on a great war by plundering and destroying the property of defenceless villagers". In fact, the operations in the Baltic sea were in the nature of binding forces. It was very important to divert Russian forces from the South or, more precisely, not to allow Nicholas to transfer to Crimea a huge army guarding the Baltic coast and the capital. This goal Anglo-French forces have achieved. The Russian Army in Crimea was forced to act without superiority in forces. In August 1854 a Franco-British naval force captured and destroyed the Russian Bomarsund fortress on Åland Islands. In the August 1855, the Western Allied Baltic Fleet tried to destroy heavily defended Russian dockyards at Sveaborg outside Helsinki. More than 1,000 enemy guns tested the strength of the fortress for two days. Despite the shelling, the sailors of the 120-gun ship Rossiya, led by Captain Viktor Poplonsky, defended the entrance to the harbour. The Allies fired over 20,000 shells but failed to defeat the Russian batteries. The British then built a massive new fleet of more than 350 gunboats and mortar vessels, which was known as the Great Armament, but the war ended before the attack was launched. Part of the Russian resistance was credited to the deployment of newly invented blockade mines. Perhaps the most influential contributor to the development of naval mining was a Swede resident in Russia, the inventor and civil engineer Immanuel Nobel (the father of Alfred Nobel). Immanuel Nobel helped the Russian war effort by applying his knowledge of industrial explosives, such as nitroglycerin and gunpowder. One account dates modern naval mining from the Crimean War: "Torpedo