United Federation of Planets
Archanis IV was an inhabited planet. It was the fourth planet of the Archanis planetary system. This system was located in the Archanis sector. This system was located close to the Federation-Klingon border. (TOS: "Day of the Dove"; DS9: "Broken Link")
Prior to the beginning of the Federation-Klingon War, Gowron sent a message to the Federation Council, telling them to remove all Starfleet forces from the planet and the system. The planet was soon taken over by the Klingons, although Starfleet would be regrouping for a counter-attack on the Archanis sector some months later. (DS9: "Broken Link", "Apocalypse Rising", "Nor the Battle to the Strong")
The fate of Archanis IV after the brief Federation-Klingon war ended in mid-2373 had not been mentioned on screen.