The turret made the employment of its armament much more flexible and effective, and the whole vehicle was considerably more agile and easy to drive than its heavier partners, yet better protected. Although the short length of the vehicle, rectified somewhat with the addition of the special tail, often made trench-crossing difficult, the track assembly with its large front wheel gave the tank good ability to climb high obstacles. It also proved easily adapted to form numerous variations (besides the basic variants, equipped with either one MG or one 37mm cannon), including a Signals and Command tank (TSF), a 75mm gun tank and a Fascine Carrier.
Both the French and the US used the FT during WW1, and the British and Canadian forces employed some, in the capacity of Liason Vehicle: they removed the weaponry and left the hole open, to enable the passenger a good view forward.
