Onslaught at Arda I is the first adventure supplement for the Star Wars: Age of Rebellion Roleplaying Game, exploring the Rebel Alliances desperate struggles, along with the tenuous alliances they form to stand against an overwhelming enemy. This 96-page adventure is set at Arda I, a secret Rebel Base, and features mass-combat rules that Game Masters can use to give life to massive battles. Meanwhile, in-depth gazetteers cover the Arda I base, as well as all-new adversary and vehicle profiles!