I came across your post this morning on light-stalkers.
Although, we do not have any images that fit your brief exactly, we do have many sets of US troops interacting Afghanis; on the border, with locals and in training, which I have pasted below.
http://www.demotiximages.com/photo/us-forces-afghanistan70431 (click on â€˜sister imagesâ€™ to see the rest from the set)
http://www.demotiximages.com/photo/titan-task-force-kherwar-valley-afghanistan76156 (click on â€˜sister imagesâ€™ to see the rest from the set)
Afghan soldiers training:
I hope these pictures are useful!
Are you a freelance picture researcher, or is this a one-off project? I would be good to talk if you regularly look for imagery.
With warm regards,