Photograph of Joseph-Armand Bombardier and his oldest son, Germain. The inventor is standing on the tracks of the vehicle, raising his hat. This photograph was taken in the winter of 1941. It is a prototype of an all-track vehicle with a rudimentary wooden cabin installed on top. This was during the Second World War, and Joseph-Armand was busy working on all-track vehicles and the possibility of building an armoured snowmobile. His experiments produced several vehicles, including the Mark I. Replacing the front skis with tracks gave the vehicle greater maneuverability on a variety of terrains.