An excellent but somewhat depressing documentary in 3 parts (I've only seen part 1 so far) showing US troops training Afghans. It shows translated subtitles of what the Afghans say about the soldiers right in front of them, corruption, drugs and child rape.
http://www.vice.com/en_uk/vice-news/this-is-what-winning-looks-like-part-1
http://www.vice.com/en_uk/vice-news/this-is-what-winning-looks-like-part-1