The Northrop F-5 Freedom Fighter and Tiger II are masterpieces of "elegant simplicity", proving that a fighter doesn't need to be large or complex to be effective. Developed in the late 1950s as a lightweight, low-cost, and easy-to-maintain alternative to heavier American jets, the F-5 became one of the most successful export fighters in history. Its sleek, aerodynamic lines and twin J85 engines provided surprising agility and supersonic performance with a fraction of the operating costs of its contemporaries. While it served in dozens of allied air forces, it is perhaps best known in the U.S. for its long service as an "aggressor" aircraft, mimicking Soviet MiGs in mock dogfights to train generations of fighter pilots in the art of air combat.