The development of the F-5 lightweight supersonic fighter in the mid-1950s was almost a gamble for the Northrop Corporation, but ultimately resulted in one of most commercially successful combat aircraft in modern history. Iran was one of its major export customers, yet the long and often violent history of deployment of the F-5 in that country has largely escaped attention of historians. No less than 309 aircraft of five major variants of the jet – the F-5A, F-5B, RF-5A, F-5E and F-5F – have provided the backbone of the frontline strength of the Iranian Air Force since the mid-1960s. Additional examples were clandestinely purchased from Ethiopia and Vietnam in the 1980s. The type bore the brunt of combat operations during the long war with Iraq, 1980-1988, and remains a mainstay of the Islamic Republic of Iran Air Force as of today.