During the Iron Blockade, which was established by the Empire in an attempt to prevent news of their crushing defeat by the Alliance to Restore the Republic at the Battle of Endor from reaching the Anoat sector's populace, an unidentified individual on Allyuen sent out a call for help on a less used communication frequency, requesting medical aid and extraction. In response, the Smuggler sent a crew member to Allyuen to render assistance.
Allyuen was first mentioned in the radio adaptation of Star Wars: Episode V The Empire Strikes Back. It became canon when it appeared in the action role-playing game Star Wars: Uprising, which was developed by Kabam for iOS and Android platforms and released on September 10, 2015.