Starbase 23, code-named Gateway Station, is a Spacedock-class space station located on the Federation border to the Romulan Republic and the Independent Romulan Factions. Constructed in the late-2390s, it was designed to replace border infrastructure that dated back to before the Romulan supernova and the collapse of the Romulan Neutral Zone. Under the command of Fleet Captain Lionel Jericho, Gateway Station is now the hub of Starfleet operations in the Midgard Sector, a region that stretches across the territory of the Federation and Republic, as well as the collapsed Neutral Zone and the former territories of the Star Empire of Rator. Its mission is to maintain stability in the area through humanitarian operations and diplomacy with local Romulan factions, further Federation ambitions in the sector, and act as a platform for exploration into former imperial territories, regions Starfleet has never been able to study before.