Battles and other military operations that took place on lake or sea ice include: * about 530 – Battle on the Ice of Lake Vänern, recorded in Norse sagas and referred to in the Anglo-Saxon epic Beowulf * 1242 – Battle on the Ice on Lake Peipus * 1270 – Battle of Karuse on the frozen Baltic Sea between the Island of Muhu and the mainland * 1658 – March Across the Belts, Charles X Gustav's march over the Little Belt and the Great Belt during the Second Northern War * 1809 – Finnish War * Barclay de Tolly's advance from Vaasa to Uumaja in Sweden, see Battle of Ratan and Sävar * Bagration's and Kulnev's attack from the Åland Islands to Grisslehamn in Sweden * 1940 – Battle of Vyborg Bay (1940) in the Winter War * 1941-44 - Road of Life, an ice road over Lake Ladoga that supplied the b