F.I.S.T is a 1978 movie directed by Norman Jewison and starring Sylvester Stallone. In this film, Stallone plays a Cleveland warehouse worker named Johnny Kovak who becomes involved in the labor union leadership of the fictional ‘Federation of Inter State Truckers’, and finds that he must sacrifice his principles as he moves up through the union and attempts to expand its influence. The movie is loosely based on the Teamsters union and their former President Jimmy Hoffa.

Johnny Kovak joins the Teamsters trade-union in a local chapter in the 1930s and works his way up in the organization. As he climbs higher and higher his methods become more ruthless and finally senator Madison starts a campaign to find the truth about the alleged connections with the Mob.

A number of other well known actors and actresses appeared in F.I.S.T. They included Kevin Conway, Brian Dennehy, Rod Steiger, Melinda Dillon, Richard Herd, Peter Boyle and Red Hot Chili Peppers lead singer Anthony Kiedis.

Summary via Wikipedia.