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Uploaded on Mar 16, 2011
The Overmind promptly launched its invasion force onto Aiur, with the assistance of many cerebrates, including its newest one. The Overmind's attack was not mindless, however. It ordered the new cerebrate to acquire a khaydarin crystal without revealing any reason for doing so. The force that defended the crystals, called the "Vanguard of Aiur", was much larger than the Expeditionary Force that the zerg had fought before. Nonetheless, the zerg defeated the Vanguard of Aiur and acquired the crystal.