Sigma Centari

Sigma Centauri was a space platform occupied by the Terran Dominion in 2504 and was in constant combat with the zerg. It was heavily fortified and had numerous missile turrets for defense against attacks by zerg mutalisks. This resulted in a stalemate between the two sides.

Abathur chose this platform to test the re-assimilated Brood lords, after recovering their essence and incorporating it into the existing mutalisk strain. On Kerrigan's orders, the brood lords attacked the platform and destroyed the Planetary fortress, ending the stalemate.