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
Collapse of the Atlantic northwest cod fishery that extended to 200 mi offshore. The government wanted to reverse declining fish stocks by removing foreign fishing within the new inshore fishery boundaries. With the absence of foreign fishing many Canadian and U.S fishing trawlers took their place and the number of cod kept diminishing past a point of recovery. Many local fishermen noticed the drastic decrease of cod and tried to inform local government officials. In 1986, scientists did a review of calculations and data after which they determined, in order to conserve cod fishing the total allowable catch rate had to be cut in half. However, even