Multiwagon is pretty much on the ball here, especially with the blue soldier. Here's some more info on the truck:Truck clip
The original was a very bright, sunlit shot. Not the most obvious candidate for day-for-night (indeed, Ashman didn't shoot this scene with that in mind).
A simple day-for-night filter was applied to the source clip in VisionLab Studio. Settings were tweaked slightly to get the desired appearance.
A new grade object was applied above the source clip. Masks were used to draw the headlights and animate them to match the movement of the truck. Then a gamma filter was applied to brighten the masked area. Gamma seemed to look more real than using a brightness filter.
Sky & Tinting:
An ambient light filter was also added to the headlight grade object, to make the light beams more yellowy-green, rather than the flashlight-style blue.
Finally, a second grade object was added. A rectangular mask was placed to cover the sky area, and a gamma filter was used again to darken the sky. This was a vital move, as the bright sky really gave the game away.