UED security guards were marines employed by the United Earth Directorate's Science Corps.
Kerrigan defeated the United Earth Directorate forces on Korhal and retreated to Tarsonis, the UED responded with a counterattack, sending a pair of Slave Broods to attack Kerrigan's forces.
The UED used
scientists to coordinate their zerg forces. Security Guards were assigned to protect the engineers. However, Kerrigan's forces defeated them, destroying the Slave Brood forces and killing all the scientists.
Game Unit Edit
UED Security Guard
4 (5 with upgrades)
Marines and firebats double their rate of fire and increase their movement rate for a limited period of time.
Increases marine attack range by 1 (to 5)
Vivendi Games. Mission: StarCraft: Brood War. Fury of the Swarm (in English). 1998.