The Republic of Erewhon was a single-system star nation with the planet Erewhon as its capital. It was allied with the Solarian League and, like Manticore, in possession of a wormhole junction, the Erewhon Wormhole Junction. Its terminus in the Terra Haute System was 25 light-years away from the Hennesy Terminus of the Manticore Wormhole Junction.