Was This The First Prequel?

There's a list of prequels here: https://en.wikipedia.org/wiki/List_of_prequels

Looks like the earliest prequel film was "The Golem: How He Came into the World" from 1920.

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Davy Crockett and the River Pirates, for one. About 40 years earlier.

Zulu Dawn came out 5 years before this.