Exercise Teamwork was a a major NATO biennial exercise in defence of Norway against a Soviet Maritime threat (Operation Northern Norway) against allied sea-lanes and force US commanders to reconsider tactics in the conduct of Harpoon missile striker, mine-laying missions, and air-to-air combat. It was founded between Norway, Denmark, the UK and the USAF in 1982 and has grown since. Teamwork '88 allowed NATO to evaluate there ability to conduct a maritime campaign in the Norwegian Sea and project forces ashore in northern Norway, as well as to generally upgrade the battle plans and war strategies for the region.