After its defeat at the battle of yavin the empire has tightened its grip on the surrounding systems nearby a secret rebel base on arda i hides seemingly safe from planetary sensor scans when imperial star destroyers appear in orbit the rebels scramble to evacuate it falls to a group of new recruits to defend the base from the imperial onslaught onslaught at arda i is the adventure supplement for star wars age of rebellion roleplaying game exploring the rebel alliance s desperate struggles along