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The Siege of AR-558 was a ground battle between Starfleet and the Dominion during the Dominion War.

In 2375, Starfleet sent Benjamin Sisko and the crew of the USS Defiant to resupply AR-558, a planet in the Chin'toka system that housed a Dominion communication array that the Jem'Hadar had been attacking the Starfleet ground forces to recapture. Seeing the direness of the situation faced by the Starfleet forces, Sisko, Julian Bashir, Ezri Dax, Nog and Quark remained on AR-558. Nog lost his left leg during a Jem'Hadar attack. Sisko later led the Starfleet forces against the Jem'Hadar, a battle which was helped by taking control of the Dominion Houdini mines and using them against the Jem'Hadar. (DS9 episode: "The Siege of AR-558")

Bashir recalled the siege of AR-558 in 2385, remembering his lack of sleep and experience of double vision. (ST - The Fall novel: A Ceremony of Losses)

Battles of the Dominion War
2373 : Second Battle of Deep Space 9Battle of Torros III
2374 : Battle of TyraOperation ReturnBattle of SybaronBattle of BetazedLiberation of BenzarSecond Battle of VulcanisFirst Battle of Chin'toka
2375 : Battle of RigelBattle of Monac IVBattle of Ricktor PrimeBattle of GolorothInvasion of Septimus IIISiege of AR-558Raid on San FranciscoSecond Battle of Chin'tokaKalandra CampaignBattle of RashanarBattle of Rondac IIIBattle of Avenal • Battle of Cardassia
Other battles: Battle of AlaiaBattle of Laktar