Tosh was a male soldier of the Galactic Republic stationed on Balmorra during 3642 BBY. While preparing for the assault on the Balmorran Arms Factory at the Sundari Flatlands, Tosh and his squad were attacked by mutated Colicoid's from a nearby laboratory. After Captain Langstrom was killed, Sergeant Tenn took over as the commanding officer and retreated with what remained of the squad, before calling for reinforcements. Tosh himself refused to face the Colicoids again and even shot himself in the foot so that he couldn't be forced to.