From FFG:
Dawn of Rebellion, the first Era Sourcebook for the Star Wars Roleplaying Game, is available now from your local retailer or on our webstore! Drawing from the characters, locations, and equipment featured in Rogue One: A Star Wars Story and the Star Wars Rebels series, Dawn of Rebellion gives players and Game Masters the tools and the inspiration to create their own adventures set in the early days of the Rebellion against the indomitable war machine of the Empire.
Whether your campaign is primarily themed around Edge of the Empire, Age of Rebellion, Force and Destiny, or a blend of all three, Dawn of Rebellion offers a range of new specialization trees and species for you to use as player characters and the denizens of the galaxy that they meet. Location dossiers for iconic worlds such as Alderaan, Jedha, Dathomir, and more contribute terrific source material for your tales of danger and adventure. Additionally, extensive information on every level of the organization of the 
For Game Masters, Dawn of Rebellion offers significant insight into the workings of many Imperial organizations that may vex players, no matter the theme of the campaign. The Imperial Army and Navy are obvious foes, and ones that might largely be avoided by characters not playing an Age of Rebellion story.
However, COMPNOR, the Imperial Security Bureau, and the Inquisitorius are fundamentally more insidious and pervasive. Beyond that, other groups like criminal organizations and independent Rebel cells provide both allies and opposition, as all kinds of motivations and goals may align or counter in interesting ways.
