It's very hard to make a film about Attila and his times because if you want to make it historically accurate, well, that's not a simple thing. There are many Church traditions about Attila and his eventual sparing of Rome but historians of the day were notorious for shaping it to make themselves or their leaders look best. It is what it is...or was. So, it's difficult to say exactly what Attila did....such as the death of his brother...of which are contradictory accounts. This version of his latter days is based mostly on Church traditions.
Like many films of the 1950s and 60s, European filmmakers hired a famous American actor to star in the production. In this case, Anthony Quinn plays Attila the Hun...and he also appeared in a few other European films, such as Fellini's "La Strada". And, Quinn was then dubbed into Italian...as most of the actors in the film are Italians (though it's a French-Italian co-production).
The story is set from the period in which Attila agreed to a substantial bribe by the Romans not to destroy the Empire. Shortly after this, Attila reneged on the agreement and a long strong of bloody battles resulted. This film dramatizes this period and offers a traditional view as to why he spared Rome.
The film is well made and entertaining....it just isn't perfect history because of all the speculation. But this is NOT a reason to skip the film. It's well worth your time and it's also nice to see Sophia Loren in a supporting role early in her film career.
By the way, although the acting was generally good, the character Emperor Valentinian III seemed a bit overacted. Perhaps I'm wrong...he just didn't seem all that realistic.
