The Man Who Would Be King (1975)

What it's about

Tired of life as soldiers, Peachy Carnehan and Danny Dravot travel to the isolated land of Kafiristan, where they are ultimately embraced by the people and revered as rulers. After a series of misunderstandings, the natives come to believe that Dravot is a god, but he and Carnehan can't keep up their deception forever.