 Development of the "L3 Lf" flamethrower ("lancia fiamme") flame tank began in 1935.The flamethrower nozzle replaced one of the machine guns, and the flame fuel was carried in an armoured 500 litre (133 US gallons) fuel trailer towed by the vehicle.Later versions carried another 60 litres of fuel in a box-shaped tank mounted above the L3's engine compartment.