I lunghi giorni della vendetta internationally released as Long Days of Vengeance, Days of Vengeance and The Deadliest Gunfight is a 1967 Italian western film directed by Florestano Vancini. It is the only western directed by Vancini, here credited as Stan Vance. The film is a spaghetti western version of Alexandre Dumas novel The Count of Monte Cristo.
In his investigation of narrative structures in Spaghetti Western films, Fridlund groups this film with some other successful westerns where the Giuliano Gemma character is falsely accusted and seeks vindication. What sets I lunghi giorni della vendetta apart is its skillful play with ironic humour and surprises.
Source: Wikipedia