"I called for reinforcements after they grabbed Captain Langstrom"
―Sergeant Tenn[src]

Langstrom was a male captain of the Galactic Republic stationed on Balmorra during 3642 BBY. While preparing for the assault on the Balmorran Arms Factory at the Sundari Flatlands, Langstrom's squad was attacked by mutated Colicoid's from a nearby laboratory. After Langstrom was killed, Sergeant Tenn took over as the commanding officer and retreated with what remained of the squad, before calling for reinforcements.