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Haor Chall Engineering was given a contract by the Trade Federation to create a landing ship for transporting the huge battle droid armies from the large capital class ships to the planets that were being invaded below. Their unique design and large wingspan were made to strike terror into those whom these ships are brought upon. The specially built C-9979 transport ship can hold heavy armor and legions of troops throughout the habitable volume contained within its hull. The C-9979's immense wings are removable for ease of storage and docking. When deployed, powerful tensor field generators bind the wings to the craft, and strengthen the vessel's overall structural integrity. The ship is capable of being piloted by an entire crew of droid pilots. It is also possible for small fleets of these ships to be directed by one sentient being aboard a droid control ship.
Now that Haor Chall Engineering has changed its focus to vehicles, the Trade Federation builds these massive deployment weapons of war itself, though the demand for such ships has diminished. In past days the C-9979 were used to transport Battle Droid from Lucrehulk 3210 Battleships to the surface of a planet. But now the Lucrehulks descend upon the planets themselves, and the C-9979s are used for missions where a Lucrehulk would be overkill.