The three soldiers with cameras featured in the film are SPC Michael Moriarty who signed up in a burst of patriotism after 9/11 and asked to be shipped to Iraq. His colleagues are SGT Stephen Pink, who joined the National Guard to help pay for college, and SGT Zack Bazzi. Two other soldiers, SGT Duncan Domey and SPC Brandon Wilkins, also filmed their entire deployments for the film.
In all, 17 soldiers were given cameras and recorded 800 hours of tape in Iraq. Stateside interviews with the soldiers and their families made up an additional 200 hours of tape. The "cast" was narrowed to three soldiers for the final feature length film. They were chosen in part because they were seen by the director and producers as the "main characters".
The War Tapes - War documentary