Battle of Sector 654

The Battle of Sector 654 was a battle fought between the Borg and the Federation during the Borg assault on the Federation in 2382, in which a single Borg cube penetrated Federation space in an attempt to assimilate Bajor. The Borg Cube was leftover from the Borg Invasion of 2381 and avoided the Federation for a year until 2382.

Prelude
The third major Borg incursion into Federation space began shortly before the attack at Sector 654 in 2382. Deep Space 5 detected the attack, and long-range sensors detected a single Borg vessel. Vice Admiral Hayes was immediately informed when it was determined the cube was on a direct course for Bajor.