The XT-37 is a six-wheeled amphibious infantry fighting vehicle. Armed by 125-mm cannon (as used in typical main battle tank), twin 12,7-mm machine-gun (for eliminate enemy troops and anti-aircraft usage) and two surface-to-air missiles.
Also equiped by smoke launchers.
Crew 3 (commander, gunner, driver) + 6 (troops also may use own personnal weapon)
In this picture I used colour pencil and soft pastel (one of my first work with pastel)