Tieos was an agriworld with a multitude of farms, numbering in the hundreds, situated within the Abrion sector located in the Outer Rim Territories. After the Clone Wars commenced with the outbreak between the Galactic Republic and the Separatist Alliance, Tieos, along with the remainder of the sector, was swayed to leave the Republic and join the Confederacy under the leadership of Senator Esu Rotsino, who previously represented the sector within the Galactic Senate. Following this shift in allegiance, Rotsino proceeded to act as the representative for the planet and the Abrion sector within the Separatist Senate, while the Confederacy aimed to utilize its foodstuffs to coerce starving star systems into joining their cause.
The initial mention of Tieos within the new Star Wars canon occurred in Rise of the Separatists, a 2019 addition to Fantasy Flight Games' Star Wars Roleplaying series. In the Star Wars Legends continuity, Tieos first appeared in The Star Wars Sourcebook, a 1987 reference work created by Bill Slavicsek and Curtis Smith for Star Wars: The Roleplaying Game, which was released by West End Games. The planet later made its debut appearance in Star Wars: Rebellion, a video game that was released by LucasArts back in 1998.