A mysterious master criminal known as The Voice plots with his gang to sabotage the Milesburg Oil Company, but the rightful heir has a secret army of her own to protect her rights.
Unfortunately the movie The Vanishing Legion is not yet available on Disney Plus.
| Directing | Ford Beebe | Director |
| Directing | B. Reeves Eason | Director |
| Writing | Wyndham Gittens | Screenplay |
| Writing | Ford Beebe | Screenplay |
| Writing | Helmer Walton Bergman | Screenplay |
| Production | Nat Levine | Producer |
| Sound | Lee Zahler | Music |
| Editing | Wyndham Gittens | Editor |
| Editing | Ray Snyder | Editor |
| Crew | George Lowerre | Sound Recordist |
| Crew | Yakima Canutt | Stunts |
| Crew | Cliff Lyons | Stunts |
| Camera | Ernest Miller | Director of Photography |
| Camera | Benjamin H. Kline | Director of Photography |
