See photos of America's failed attempt to create a tank out of a tractor
The US Army's early attempt to create an armored vehicle fell short. See images of the flawed but influential Holt hybrid ...
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See photos of America's failed attempt to create a tank out of a tractor
The emergence of British and French tanks prompted the US Army ... existing Holt Model 75 tractor powered by a modified hybrid gas-electric engine. The four-cylinder gasoline engine supplied ...