A Federation outpost where a new and violent group of Borg drones killed the entire population.
Ohniaka III hosts a Federation research outpost. Its destruction marks the return of the Borg in an unexpected form, with drones acting as individuals and showing aggression.
In Descent, the Enterprise responds to a distress call from Ohniaka III and finds the outpost's people dead. An away team battles Borg drones there, and Data feels anger for the first time when he kills one. The attack begins the hunt for the rogue Borg led by Lore.