| Name | Character | Episodes |
|---|---|---|
| Josh Charles | Narrator | 8 |
| Barack Obama | Self (archive footage) (as President Barack Obama) | 3 |
| Jake Abel | Sgt. Brad Larson | 2 |
| J.R. Villarreal | Gallegos | 2 |
| Ben Schwartz | Vito Bertoldo | 1 |
| Paul Wesley | Clint Romesha | 1 |
| Aldis Hodge | Edward Carter | 1 |
| Steven R. McQueen | Joseph Vittori | 1 |
| Daryl Sabara | Mace | 1 |
| Tait Blum | Young Antolak | 1 |
| Oliver Hudson | Richard Etchberger | 1 |
| Johnny Messner | Lt. Harry Randall | 1 |
| Scott Haze | John Daniel | 1 |
| Matt O'Leary | Lyle Conaway | 1 |
| Carter Jenkins | Joe Annello | 1 |
| Ryan Ochoa | Pvt. Jenkins | 1 |
| Jonny Weston | Ty Carter | 1 |
| Grant Harvey | Hardt | 1 |
| Grant Harvey | Joshua Hardt | 1 |
| Joseph Cross | Sylvester Antolak | 1 |
| Aaron Hill | Corporal Oak | 1 |
| Stephen Brown | Doctor | 1 |
| Jonathan Stanley | Lt. Adams | 1 |
| Jonathan Stanley | Bill Husband | 1 |
| Joe Sobalo Jr. | Pvt. Cooper | 1 |
| Joseph David-Jones | Jonesy | 1 |
| Robert DuBois | Sgt. Hill | 1 |
| Brett Edwards | Red | 1 |