Zorro's Fighting Legion is a 1939 Republic Pictures film serial consisting of twelve chapters. It features Reed Hadley as Zorro.
The plot revolves around his alter-ego Don Diego's fight against the mysterious evil Don Del Oro. Zorro has to prevent him from taking over the Republic of Mexico and stealing some valuable lands. Francisco, a man who is protecting the gold trade of the republic, helps Don Diego in his attempt to stop Don Del Oro.