You may be looking for:
The Gauntlet was a Dominion military training ground. The Zerg Swarm settled the world where it was built and overran the facility. After all attempts to dislodge the Swarm failed, Emperor Arcturus Mengsk decreed the construction of a New Gauntlet, for which the engineers utilized the original blueprints with minor but important differences.
The Gauntlet is a map for StarCraft supporting 2 players. The creation of two Gauntlets is an in-joke by Blizzard Entertainment staff, responding to criticisms that the original version of the map favored the zerg too highly.