Formula One (also Formula 1 or F1) is the highest class of single-seat auto racing that is sanctioned by the Fédération Internationale de l'Automobile (FIA).

The Eagle Mk1, commonly referred to as the Eagle T1G, was a Formula One racing car, designed by Len Terry for Dan Gurney's Anglo American Racers team. The Eagle, introduced for the start of the 1966 Formula One season, is often regarded as being one of the most beautiful Grand Prix cars ever raced at the top levels of international motorsport.

Dan Gurney had been driving in Formula One since the late 1950s. While driving for the Brabham works team, he joined with a group of prominent motor racing figures and financial backers in the United States, including Carroll Shelby, to found All American Racers. This effort was largely backed by the Goodyear Tire & Rubber Company, in an effort to challenge Firestone's longtime dominance of American open-wheel racing. Inspired by the performance of Jack Brabham and Bruce McLaren's own teams, AAR decided to enter Grand Prix racing.