During the "Golden Era" of the Italian "Spaghetti" Western Films, the Greek film company ("Finos Films" and several other smaller) wanted to "copy" that "western madness" of the global film companies.
Obviously, making a real American Western film (with Mexicans, Native Indians, etc) in Greece looked quite "odd" (or ridiculous to be more exact), so the producers thought to bring to life the VERY tragic era of late of 19th / early of 20th of the "young" (newborn) Greek State. Greeks, from the moment they rioted against the Turks (1821) they didn't stopped fighting in small or large scale wars! So, around 1900, the Greek State was a VERY VERY POOR state, with very few ultra rich land-owners (purchased huge lands from the previous Turks' owners) and all the rest Greek population very poor and working AS SLAVES to their lands.
It was the "Golden Era" of the GREEK BANDITS, many many became "Captains" with bandit groups and they "divided" the Greek country to "States". Bandits like Davelis, Yagoulas, Jadjas, Koubay Brothers, Gandaras, are few of the VERY VERY FAMOUS Bandit Leaders... Also, it was the era of the low-class rioting against the land-owners, to gain their own small land states.
...So, this film is set-up on that era and on these events.
It's a VERY GOOD film, as it is the FIRST of the "Greek Westerns".