History of the North Sea United Kingdom and Germany signed the Treaty of Heligoland. The Cod War of 1893 erupted between Denmark and Britain over fishing territories. Denmark declared a fishing territory of 13 nautical miles (24 km) around their shores which included Iceland and the Faroe Islands. Britain did not acknowledge this claim. Tensions in the North Sea were again heightened in 1904 by the Dogger Bank incident, in which Russian naval vessels mistook British fishing boats for Japanese ships and fired on them, and then upon each other. The incident, combined with Britain's alliance with Japan and the Russo-Japanese War led to an
History of fishing lasted for more than 1000 years, passing through periods of Black Death, wars and other crises and still is an important Norwegian fish trade. The Portuguese have been fishing cod in the North Atlantic since the 15th century, and clipfish is widely eaten and appreciated in Portugal. The Basques also played an important role in the cod trade and are believed to have found the Canadian fishing banks in the 16th century. The North American east coast developed in part due to the vast amount of cod, and many cities in the New England area spawned near cod fishing grounds.