This 3D model was originally created with Sketchup 13 and then converted to all other 3D formats. Native format is .skp 3dsmax scene is 3ds Max 2016 version, rendered with Vray 3.00 Development of the Marder series of self-propelled anti-tank guns in late 1941 to increase the mobility of anti-tank weapons by mounting them on a variety of available chassis. The Germans saw a need for this vehicle type following the appearance of new Russian armoured fighting vehicles, especially the T-34 series of medium tanks and the heavy KV series. Vehicles of the Marder series were based on proven chassis of obsolete tanks, as well as on those of captured vehicles. In all cases, the main armament had a limited traverse, forcing the vehicle to change its position to face the enemy and aim the gun.