The Arkadianate was a Sith state that was located in the Grumani sector during the Republic Dark Age and the Sith civil war. It was led by the Sith Lord Arkadia Calimondra and the frozen planet Syned served as its capital. The Arkadianate had borders with the Dyarchy, a Sith state that was ruled by Arkadia's siblings, Dromika and Quillan, and in c. 1032 BBY, Calimondra's forces annexed the Dyarchy.