The Eagle Manufacturing Co. of Appleton, Wisconsin was founded in 1888, and early products included a wide range of tools and farm implements. In 1899 they produced their first stationary gas engine, and in 1905 experiments began on a gasoline-powered tractor. The first model was a two-cylinder design, closely followed by a range of four-cylinder tractors in 1910, produncing 16-30, 25-45 and 40-60 hp. These were still relatively heavy machines, and in 1913 Eagle introduced the two-cylinder Model D series to meet farmers' demands for a lightweight tractor. These were soon followed by the well-known Model F and Model H series, many of which have survived until the present day. The last of the two-cylinder Eagle tractors was the Model E, with its distinctive forward-facing radiator. In 1930, Eagle introduced a completely new design - the six-cylinder Model 6A, which was very similar in appearance to an Allis-Chalmers or Rumely 6. The 1930s saw two further models, the 6A and 6C, before Eagle gave up tractor manufacturing for good.

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