Exercise Strikeback was a major naval exercise of the North Atlantic Treaty Organization (NATO) that took place over a ten-day period in September 1957. As part of a series of exercises to simulate an all-out Soviet attack on NATO, Exercise Strikeback was tasked with two objectives. Its initial objective was the deployment of NATO's naval forces (designated the "Blue Fleet") against other NATO forces attempting to simulate an "enemy" navy that featured a large number of submarines (designated the "Orange Fleet"). Its other objective was to have the Blue Fleet execute carrier-based air strikes against "enemy" formations and emplacements along NATO's northern flank in Norway.