In 1769, the very first self propelled road vehicle was a military tractor invented by French engineer and mechanic, Nicolas Joseph Cugnot (1725-1804).
Cugnot used a steam engine to power his vehicle, built under his instructions at the Paris Arsenal by mechanic Brezin. It was used by the French Army to haul artillery at a whopping speed of 21/2 mph on only three wheels.
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