Sometime within the span of the Imperial Era, N-3RO, the EV-series supervisor droid, spearheaded a mutiny. This rebellion was directed against his master, Jek-14, and the Freemakers, Jek's recently acquired companions, and it occurred on the planet of Zoh. R0-GR, a B1-series battle droid, successfully thwarted this rebellion and subsequently documented the incident in his "droidography."