The Renault FT (it gained the 17 only after the war) weighed in at 6.7 tons, and carried a crew of two, a driver and a gunner/commander.

That limited its weight to seven tons, a limit he enforced with the full screaming, abusive force of his foul personality. Instead of harnessing ever-larger, and less reliable, engines to bigger tanks, Renault proposed to build a tank that suited the best available power plant. Renault believed that their designers had tried to achieve too much given the capabilities of the engines then available. Other tanks had been slow and ungainly, vulnerable to enemy artillery and close-range infantry assault. He apparently declined the French Army’s first approaches to enter tank production, but when they asked again in July 1916 he quickly had a prototype ready. Renault had already entered war production, making 75mm artillery shells that suffered an alarming number of premature explosions. The first modern tank originated with Louis Renault, the deeply unpleasant founder of the Renault automobile firm. Army quickly purchased it to equip its light tank battalions. The American observers fell in love with the little tank, and the U.S. The American Expeditionary Forces’ desire to found their own Tank Corps arrived just as the French introduced the new Renault FT17 light tank.

Modern american light tank