Britain and Iceland fought three 'wars' over fish, almost bloodlessly

Between 1958 and 1976, the UK and Iceland repeatedly clashed over fishing rights in the North Atlantic, deploying warships and trawlers that rammed each other and cut fishing nets. Despite the name, the Cod Wars produced no direct combat deaths before Iceland won expanded fishing limits. NATO reportedly pressured Britain to back down, worried Iceland might otherwise leave the alliance.

— Wikipedia contributors, Cod Wars — Anglo-Icelandic fishing disputes, 1958-1976