| Release Date | 20 October 1971 |
| Other Names | Once Upon a Time... the Revolution |
| Tagline | Rod Steiger and James Coburn will blow you apart in "A Fistful of Dynamite" ("Duck You Sucker") by the master of adventure Sergio Leone |
| Genre | Adventure, Western, Action, War |
| Country | Italy |
| Filming Locations | Almería Railway Station, Almería, Andalucía, Spain |
| Language | Italian, Spanish |
| Sound Mix | Mono |
| Color | Color |
| Film Type | Feature |
| Film Class | Spaghetti Western |
| Themes | Political Unrest, Lone Wolves, Culture Clash |
| Tones | Confrontational, Sweeping, Tense, Rousing |
| Tags | Bank, Bank Robbery, Courage, Explosion, Fugitive, Hero, Ireland, Mexican Revolution, Mexico, Odd Couple, On The Run, Peasant, Political Prisoner, Prison, Rescue, Revolution, Robbery, Team, Terrorism, Vault [safe] |
Duck, You Sucker! (Italian: ), also known as A Fistful of Dynamite and Once Upon a Time… the Revolution, is a 1971 spaghetti western film directed by Sergio Leone and starring Rod Steiger and James Coburn.