Tyson was a marine in the Confederate Marine Corps.
As a lieutenant, he was assigned to the Special Tactics and Mission Platoon, 321st Colonial Rangers Battalion during the Guild Wars on Turaxis II, taking over from Lieutenant Samantha Sanchez after her death in the Third Battle of Polk's Pride. He had a strong dislike toward Sergent Rockwell, and helped release Private Jim Raynor from the military stockades in the wake of assault charges pressed by Rockwell.
References[]
Dietz, William C. (April 6, 2010). StarCraft II: Heaven's Devils. Simon & Schuster (Gallery Books). ISBN 978-1-4165-5084-6