Grid 967 was the Borg designation for a region of space controlled by the Romulan Star Empire. It contained many planets rich in resources that the Romulans had colonized, as well as various Romulan space stations.
In 2377, a Borg fleet led by the Borg Queen's diamond, cut off from the Collective in the Delta Quadrant, entered this grid to assimilate needed resources and drones. The Borg successfully assimilated the Romulan defenders and their planets, gaining desperately-needed resources to allow the Borg to rebuild. Because of this, they were able to build up sufficiently to fight the Species 8472 menace. (TNG video game: Armada II)