From the announcement:
From the skies of Scarif in Rogue One to the climatic clash above Endor in Return of the Jedi, starfighters have played a pivotal role in almost every defining battle of the Galactic Civil War. During these confrontations, the brave members of the Rebel Alliance faced seemingly insurmountable odds, squaring off against the merciless forces of the Galactic Empire in intense, ship-to-ship space combat.
Since its release, X-Wing™ Miniatures Game has invited you to enter the Star Wars galaxy and play out your own battles with some of the series’ most iconic starfighters. Leading custom-built squadrons into fast-paced, high-stakes battles, you’ve flown with the Galactic Empire, the Rebel Alliance, and the Scum and Villainy of the galaxy in countless battles. You’ve modified your ships for every scrap of speed, maneuverability, and firepower. Now, it’s time for a new chapter in your X-Wing journey.
Rebel Alliance Source
Empire Expansion Source
Scum & Villainy Expansion Source
Pre-Order Promo Source