In January of 2381, one month after Captain Picard and the crew of the USS Enterprise-E destroyed the Borg-assimilated Einstein, the Collective launched surprise attacks on the worlds of Barolia and Acamar III, completely eradicating their populations. In this case, all attacks were by Borg drones that had been out of contact with the larger collective mind and attacked independently. Note: The Borg incursions shown in TNG novels: Resistance, Before Dishonor, Greater Than the Sum were not said to be precursors of the invasion, despite both incidents occurring before Borg invasion.As a result, the entire Borg Collective came to regard the Federation as a threat that could no longer be tolerated. Towards the end of the year 2377, the USS Voyager under the command of Captain Kathryn Janeway, with the aid of Admiral Kathryn Janeway from the future, destroyed the Borg Collective's Transwarp Hub and also infected Unimatrix One with a virus that killed the Borg Queen and severely damaged the Unicomplex.
