The Dassault/Dornier Alpha Jet is a light attack jet and advanced jet trainer co-manufactured by Dassault Aviation of France and Dornier Flugzeugwerke of Germany. It was developed specifically to perform the trainer and light attack missions, as well as to perform these duties more ideally than the first generation of jet trainers that preceded it. Following a competition, a design submitted by a team comprising Breguet Aviation, Dassault Aviation, and Dornier Flugzeugwerke, initially designated as the TA501, was selected and subsequently produced as the Alpha Jet.

Both the French Air Force and German Air Force procured the Alpha Jet in large numbers, the former principally as a trainer aircraft and the latter choosing to use it as a light attack platform. As a result of post-Cold Warmilitary cutbacks, Germany elected to retire its own fleet of Alpha Jets in the 1990s and has re-sold many of these aircraft to both military and civilian operators. The Alpha Jet has been adopted by a number of air forces across the world and has also seen active combat use by some of these operators.

 In the early 1960s, European air forces began to consider their requirements for the coming decades. One such area of consideration was the requirement for a new generation of jet-powered trainer aircraft to replace such aircraft as the US-built Lockheed T-33 Shooting Star and French-built Fouga Magister. Britain and France established a collaborative program to pursue development of what was initially intended to become a supersonic jet aircraft. This aircraft was to be produced in two distinct variants for different roles: trainer and light attack aircraft. The result of this collaboration, the SEPECAT Jaguar, proved to be an excellent aircraft, but its definition had changed in the interim, and the type emerged as a full-sized, nuclear-capable strike fighter, whose two-seat variants were used for operational conversion to the type. As such, the Jaguar was not well suited for the general training mission.

This left the original requirement unfulfilled; as a result of this outcome, in 1967, France entered into a series of discussions with West Germany on the topic of a prospective collaboration effort to meet this demand. West Germany was keen to participate in such talks, having long held an interest in conducting joint training operations with France along with a desire for strengthening positive political relations between the two nations. France also valued military cooperation with West Germany, wanting to break a perceived German ideological preference for American aircraft. In 1968, a joint specification was produced out of these talks. One substantial change to the requirements was that the sought trainer was now specified to be subsonic, supersonic trainer aircraft having proven to be superfluous to practical requirements. In July 1969, a joint development and production agreement was signed between West Germany and France; under the terms of this agreement, the two nations committed to purchasing 200 aircraft, these being domestically assembled in each of their own countries.

At one point, both the German government and the German Air Force had been keen to relocate pilot training activities from the United States to France as part of the project. In 1971, however, this was abandoned over fears of a hostile US reaction and West Germany's offset obligations to the United States making such a move unpalatable. While the joint Franco-German training proposal was abandoned, the German government felt obligated to proceed with the aircraft program; at the time, Germany did not require a new trainer aircraft, but it did have a need for a replacement for its fleet of Fiat G.91 attack aircraft. Accordingly, Germany proposed that the aircraft be built in two distinct versions, as an inexpensive trainer for the French requirement, and as a close air support platform for the German requirement; this position was accepted by France. An initial point of contention whether to use a French or American powerplant for the aircraft was also settled, with France agreeing to solely finance the development of the French-built Larzac engine while Germany agreed to adopt the same powerplant.

A total of three groups of manufacturers produced proposals in response to the requirement; these were Dassault, Breguet and Dornier submitted the "TA501", which had been developed through a merger of the Breguet 126 and Dornier P.375 concepts, VFW-Fokker submitted their "VFT-291" aircraft, while SNIAS/MBB submitted the "E.650 Eurotrainer". Each of these proposals were to be powered by twin SNECMA Turbomeca Larzac turbofan engines. The German Air Force had insisted that the trainer have two engines after having suffered from severe aircraft attrition rates due to the high accident rate of the single-engine Lockheed F-104 Starfighter.

SOURCE: Wikipedia