The scene where the two hoods walk into the tavern to rob it, only to find that it's full of cops is based on an actual event that took place in an infamous after-hours bar on Chicago's near North Side where policemen gathered after their shifts. Among the cast are several veterans of the Chicago Police force including Dennis Farina.
Considered as something of a comeback-vehicle for Kris Kristofferson after Heaven's Gate. He found it way too violent and did Flashpoint (1984) instead made a year before this film and written by the same two guys who wrote this film.
The script was written for both Clint Eastwood and Kris Kristofferson but they both turned it down. Ironically the guys who wrote the story for this film wrote Pale Rider and Flashpoint in which both Eastwood and Kristofferson appeared in.