Major Mansfield was the commanding officer of SG-17. He participated in the joint mission with SG-1 to the Tok'ra base on Revanna in preparation to destroy the Goa'uld leadership at the summit of System Lords. He and his team, including Lieutenant Elliot, were killed in Zipacna's attack on Revanna.
Portrayed by: Anthony Ulc
Cross Reference: Lieutenant Elliot, Revanna, SG Teams
Episode Reference: Summit