Television movie debut for Lee Marvin. This is despite appearing in a number of television series episodes and the movie Contratto per uccidere (1964), which was originally made for television but ended up being released theatrically because it was thought to be too violent for TV.
This is the only movie sequel that Lee Marvin ever appeared in. His character Major John Reisman did not appear in the next two Dirty Dozen TV movie sequels, Quella sporca dozzina: Missione speciale (1987) and Quella sporca dozzina: missione nei Balcani (1988). His character was replaced by Major Wright played by Telly Savalas. Savalas had appeared in the original Quella sporca dozzina (1967) movie as Archer Maggott where his character was killed-off.
Ernest Borgnine is the only actor from the original Quella sporca dozzina (1967) movie to appear in all four "Dirty Dozen" movies.
As they're departing for training camp, Reisman asks Bowren "What do you think?" to which he replies "I think the first chance one of these guys gets, he'll shoot the Major in the back." That's the same exchange the two had in Quella sporca dozzina (1967).