Cod Wars Third Cod War (November 1975 – June 1976) began after Iceland again extended its fishing limits, now to from its coast. The British government did not recognise the large increase to the exclusion zone and so an issue occurred with British fishermen and their activity in the disputed zone. The conflict, which was the most hard-fought of the Cod Wars, saw British fishing trawlers have their nets cut by the Icelandic Coast Guard, and there were several incidents of ramming by Icelandic ships and British trawlers, frigates and tugboats. One of the most serious incidents occurred on 11 December 1975.
Collapse of the Atlantic northwest cod fishery with these new statistics brought to light no changes were made in regards to the allotted yearly catch of cod. With only a limited knowledge of cod biology, scientists predicted that the population of the species would rebound from its low point in 1975 and when Canada extended its fishing boundaries in 1976, fish mortality decreased immediately. This was not due to a rise in cod stocks, it was because foreign trawlers could no longer fish the waters. Therefore, when Fisheries and Oceans set quotas, they overestimated the total stock, and increased the total allowable catch. In 1992, John Crosbie,