Type 91 So-Mo Armoured CarAlso referred to as the Type 91 broad gauge railroad tractor, the So Mo has the unusual distinction of being able to quickly switch from road to rail. The So Mo could achieve speeds of around 25 miles per hour on roads and almost twice that on railroads. Fielded by both the Imperial Japanese Army and the SNLF during World War II, the six wheel drive So Mo also served in the 1937 Japanese invasion of China. The vehicle did not have integral weapons,