The soldiers had just moved to the desert, and as they had never been in such a place before, they had a lot to learn.
As there were no trees or buildings in the desert, it was, of course, very hard to hide their tracks from enemy. The soldiers were therefore given training in camouflage, which means ways of covering something so that the enemy cannot see where it is. They were shown how to paint their trucks in irregular patterns with pale green, yellow, and brown paints, and then to cover them withs to which they had tied small pieces of cloth.
The driver who had the biggest truck went to lot of trouble to camouflage it. He spent several hours painting it, preparing a and searching for some heavy rocks with which to hold the down. When it was all finished, he looked proudly at his work and then went off to have his lunch.