I like what you have done, particularly the way you have taken your photographs - a great way to show off your models. The colour of the dust ties everything together as it appears on boots too....maybe some on
the elbows and backsides would look good, as those troops will have fought through that dust on their bellies, backs and behinds, anything that kept them out of the way of the bullets.
one thing though - that guy on the front drivers side, he looks like he sat down on a tie-down bracket- his face tells a story :-)
keep up the good work, and lovely photography.