"Exile" is the name given to the people who disagree with Union’s ideology, and created their own settlements around the deep wasteland. Each settlement has its own ideology, but they are united together due to the same threat from Union.
Exile villages designs: https://www.artstation.com/artwork/8baww6
Most Exile settlements are created using salvaged structures and takes benefits from surrounding terrains, such as using canyons and cliffs as cover.
Exile villages designs: https://www.artstation.com/artwork/8baww6
They also built supply posts for bigger airships that cannot dock directly in the village.
Exile villages designs: https://www.artstation.com/artwork/8baww6
Using only light machinery and bare hands, Exile airships are essentially "refurbished" versions of abandoned old sea vessel hulls.
Most of them are flipped upside-down to ensure that the center of mass is lower than the center of lift, preventing the whole ship from tipping over. This orientation also offers protection from the top and front directions.
Exile large airship design: https://www.artstation.com/artwork/LRYQgv
Thus, Exile airships has much more restrictions than Union airships. However they do not consume any fuel during travel, as they utilizes wind sails. In combat, they can engage the rocket boosters to gain 15 minutes of extreme high speed (some times higher than Union airships).
Exile large airship design: https://www.artstation.com/artwork/LRYQgv
Exile people uses scrap metal as their currency.