Koprulu Sector - Braxis

The planet Braxis is a planet of snow and ice located on the edges of the Koprulu Sector. Prior to the events of StarCraft the planet was a Protoss colony named Khyrador, and housed many Protoss artifacts, including the Uraj crystal. Escalating strife with Dark Templar and the sudden appearance of mysterious psionic storms forced the Protoss to abandon the planet and its treasures. The planet was later colonized by the Terran Dominion.

The Protoss, needing the Uraj crystal to activate the temple that would rid Shakuras of Zerg, traveled to Braxis in search of the artifact. With reluctant help from Kerrigan, the Protoss located the crystal and rescued it from Dominion hands. However, before they could leave the Protoss were stopped by the arrival of the United Earth Directorate invasion force. The UED fleet put a blockade around the planet, but Artanis and the Protoss were able to escape.

The UED invaded Braxis and attempted to capture the capital city of Boralis. What could have been a long, drawn-out battle was averted by unexpected help from Samir Duran and his resistance fighters, who showed UED forces a mountain path that allowed them to avoid the city's defenses and capture it easily. As the UED continued their conquest of the Koprulu Sector, Admiral Stukov became convinced that Duran was a traitor working for the Zerg, and returned to Braxis to reconstruct the Psi Disruptor. Though Stukov was killed by Duran, Admiral DuGalle realized the truth and was able to save the Psi Disruptor from being destroyed, using it to enslave the newborn Overmind.

However, before the UED could finally cement their control of the Sector, an alliance of Emperor Mengsk, Jim Raynor, Fenix, and Kerrigan destroyed the Psi Disruptor, enabling the Queen of Blades to regain control of the Zerg Swarm.