A dishonored Union Army officer leads a group of convicts to retake Fort Holman from the Confederate Army.
| Actor | Role |
|---|---|
 James CoburnColonel Pembroke | Colonel Pembroke |
 Bud SpencerEli Sampson | Eli Sampson |
 Telly SavalasMajor Ward | Major Ward |
 Reinhard KolldehoffSergeant Brent | Sergeant Brent |
 José SuárezMaj. Charles Ballard | Maj. Charles Ballard |
| FFrancisco SanzFarmer | Farmer |
 Ángel ÁlvarezScully the Monger | Scully the Monger |
 Mario PardoRoger, Farmer's Son | Roger, Farmer's Son |
 Ugo FangareggiTed Wendall | Ted Wendall |
| CConcha RabalNot listed | Not listed |
 Benito StefanelliSamuel Piggott | Samuel Piggott |
| GGuy MairesseDonald McIvers | Donald McIvers |
| AAlejandro de EncisoNot listed | Not listed |
 Fabrizio MorescoWard's Assistant | Ward's Assistant |
| AAdolfo LastrettiWill Fernandez | Will Fernandez |
 Turam QuiboApache | Apache |
 Carla ManciniNot listed | Not listed |
| JJoe PolliniUnion Sergeant | Union Sergeant |
 Georges GéretSergeant Spike | Sergeant Spike |
| SSharin SherApril | April |
| DDavid LandauNot listed | Not listed |
 Angelo CasadeiSoldato (uncredited) | Soldato (uncredited) |