Starfleet Records. Borg technology. Assimilation: With a ship's crew assimilated or otherwise subdued, the Borg dismantle the ship for parts to incorporate into their own technology. If possible, the assimilated ship was towed to a hangar aboard the attacking Borg ship. It is rare for the Borg to keep an assimilated ship intact, except in cases where a Borg crew is forced to abandon their own ship and take over their victims' ship. Sources: Star Trek: First Contact; VOY: "Scorpion, Part II"; ENT

Let’s take a look at the Borg’s most important episodes from Star Trek: The Next Generation. | Screen Rant