I think this has something to do with it:
Hugh's new found sense of individuality proved to be almost as deadly to the Collective as any file stored in his memory could be. His experiences on board the Enterprise were spread to other drones, and eventually Hugh's cube fell into a complete state of disarray. The Borg's sense of shared identity had been disrupted, and they were no longer able to function. The Collective disconnected Hugh's ship from the hive mind and left the cube drifting in space until 2370 where it was discovered by Lore, Data's brother. Lore took advantage of the confused drones and assumed leadership of the group. He brought order to chaos, and allowed the drones to maintain their individuality but was able to control them. Lore "promised" to create the Borg crew in his image, running tests on various drones, leaving them with awful injuries.
Hugh disapproved of Lore's leadership, finally realizing that Lore had no clue how to keep his promise to the drone crew, and while Lore had acquired a ship and had built a base on a remote planet, Hugh took a group of drones underground and became a leader himself. Hugh and the drones loyal to him assisted the Enterprise crew in rescuing Picard, La Forge, and Troi and recapturing Data from Lore.
He is seen again in Descent, Parts 1&2 I think.
