Imdaar was a terrestrial planet that served as the location of a supply base for the Galactic Empire during the time known as the Imperial Era. Following the Rebel Alliance's destruction of the Empire's Death Star superweapon in 0 ABY, the Alliance executed a bombing raid targeting the supply base situated on Imdaar. Later in that same year, during a gathering of Rebel Alliance leaders, Admiral Gial Ackbar cited the bombing of Imdaar as an illustration of the Alliance's activities after the Death Star's demise, responding to Princess Leia Organa's assertion that the Rebel Alliance wasn't doing enough in their fight against the Empire.
The world of Imdaar was referenced within current Star Wars canon in the fourth edition of the 2015 comic book series called Star Wars. Jason Aaron was the author of this issue, which was released by Marvel Comics on April 22, 2015. In the Star Wars Legends storyline, Imdaar initially appeared in Star Wars: Rebel Assault II: The Hidden Empire, a 1995 computer game that was created by LucasArts.