The world's first self-propelled (and indeed, high pressure) steam engine was built in France by Army Officer Nicolas-Joseph Cugnot, in 1769. Designed to help move heavy siege guns, further development of the Fardier a Vapeur was put on hold due to intrigue at the Court of Louis XV.
Find out more about the replica Fardier Cugnot at:
https://lefardierdecugnot.fr/Accueil%20en%20anglais.htm
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