The Reapers' first attack on turian space followed an age-old maxim: hit them where it hurts. A populous colony dating back centuries, Taetrus was already embedded in the turian psyche as the site of the worst terrorist attack in turian history. Wounds were still raw from the Vallum Blast, in which a separatist revolutionary slammed a starship into the colony's capital, killing more than a hundred thousand turians. Hierarchy forces responded with a massive invasion of the planet to stamp out the separatist movement. It was a catharsis for the turians, reassuring them that heroes would always triumph over evil. And so the Reapers struck Taetrus first.
By the time Taetrus went dark, the turians had already learned that the batarians and humans were under attack. The Hierarchy responded with what they believed was overwhelming force, only to walk into a trap. Reaper ships were waiting on the other side of the relay to Taetrus, and they released devastating firepower the moment the fleet emerged. Turian leaders observing the one-sided battle were faced with a choice: reinforce their side of the relay to defend against a Reaper invasion, or throw more resources into an offense. With soldiers and civilians alike clamoring for retribution against the Reapers, the turians continued the assault. The Hierarchy sent warp bombs through the relay to clear a path, fighting tooth and talon to inflict casualties against the Reaper fleet. It was a valiant effort, but doomed. The Reapers emerged victorious from the relay and began broadcasting a signal to turian comm buoys--images of Vallum, Taetrus's capital, once again a smoking wreck. The fight for turian space had begun.