Even without the Overmind, there was little doubt that the zerg would overrun the remaining protoss on Aiur. The Aiur protoss’ only hope for survival lay in escaping to the dark templar homeworld of Shakuras, where Zeratul offered to shelter the protoss refugees. It was there that the protoss were confronted by Kerrigan, who demanded to speak with the dark templar matriarch, Raszagal.
Kerrigan swore that she was no longer a merciless killer, and notified the protoss that several zerg cerebrates had merged to create a new Overmind. If this Overmind matured and gained control of the Swarm, Kerrigan warned that she would revert to the savage and cruel creature she had been. In order to prevent that from happening, Kerrigan volunteered to help the protoss fight the zerg and the new Overmind. Raszagal accepted Kerrigan’s proposition despite the reservations of Zeratul and others.
In the course of executing their plan, the protoss grew suspicious of Kerrigan. They learned too late that their alliance with her had only helped the Queen of Blades achieve her true goal: eliminating a challenge to her rule over the Swarm. Due to the dark templar’s assistance, several dissident cerebrates were destroyed.
Kerrigan departed from Shakuras even as the horrified protoss concluded that they had no choice but to finish what they had started. Utilizing the power of an ancient xel’naga temple, the protoss successfully obliterated the zerg on Shakuras. Even so, they paid a terrible price, for the cataclysmic explosion left Shakuras a wasteland of sand dunes and shattered ruins.
Unbeknownst to the terrans in the Koprulu sector, Earth had kept a long and silent watch over its far-flung colonial planets. The frightening discovery of hostile aliens managed to unite Earth as never before, leading to the formation of a new government called the United Earth Directorate (UED). When it became clear that the Koprulu colonies were losing strength, the UED’s ruling council considered it the perfect time to establish control over its distant cousins.
After monitoring zerg and protoss activity for several months, the UED was confident that it could control the zerg. By this time the UED had received word that a new Overmind had formed on the planet Char. Confident of victory, the UED dispatched an expeditionary fleet to enslave the young Overmind and use the Swarm to overthrow the Terran Dominion.
The fleet moved to secure the planet Braxis as a staging point, assaulting its capital city. The city was well defended, and progress was slow, but UED forces made contact with fighters from the Confederate Resistance Forces. Their leader, Samir Duran, explained that they had sworn to overthrow the Terran Dominion and Emperor Mengsk. These fighters volunteered to become new recruits of the UED.
With Duran’s aid, the UED soon had access to the Dominion’s primary datanet – specifically, its weapons diagnostics and other top-secret material. The UED moved on to the Dylarian shipyards, where the bulk of the Dominion’s battlecruisers were docked. Striking swiftly, the soldiers commandeered the ships for their own use and conscripted the remnants of the Dylarian defenders.
UED forces bolstered their strength further and headed to Korhal IV, capital world of the Dominion. After a fierce battle, Directorate forces laid siege to Korhal’s capital city, Augustgrad, forcing Emperor Arcturus Mengsk to contact the UED fleet requesting a parley.
The emperor’s small fleet was surrounded, but while UED forces were preparing to take Mengsk into custody, Jim Raynor arrived in Mengsk’s old battlecruiser, the Hyperion, along with a small protoss fleet. Raynor angrily made it clear that he was rescuing Mengsk only because a mutual acquaintance wanted Mengsk alive. Moments later, Raynor, his protoss allies, and Mengsk had escaped.
The UED persisted in its campaign, moving on to Char to capture the developing Overmind and, through it, seize control of the zerg. Directorate forces overcame the Overmind’s defenses and soon specially trained medics began administering powerful neurostims to pacify the organism. By then Duran had been revealed as a spy working with Kerrigan, but that discovery made little difference: the Overmind was firmly under Directorate control.