The Return of Ringo(1965)

Original title: Il ritorno di Ringo

Once again billed as Montgomery Wood, Giuliano Gemma plays a civil war soldier who returns to his family land to find his family decimated, his property taken over by a family of Mexican bandits and his fiancee about to marry the Mexican gangster behind all this. Bent on revenge, he goes undercover disguised as a Mexican and discovers he has a daughter!