The 123rd FS was established in 1999 at Seosan AB to accept its batch of the newly build block 52 airframes under the Peace Bridge II contract. These block 52 airframes are locally known as KF-16. The squadron was the third of four to equip the newly formed 20th FW.
All RoKAF F-16 squadrons have a dual tasking. In the first place they are equipped with A/A missiles as the AIM-9 and AIM-120 to defend the Korean peninsula against attacks from the north. Secondly they have a dedicated ground-attack mission. Their main equipment for this mission is the LANTIRN targeting pod together with the AGM-65 Maverick missile. This equipment is chosen to counter massive North Korean tank attacks. Furthermore these F-16s are equipped with the advanced ALQ-165 ECM system which is a fully internal passive and active counter measures system. Therefore these aircraft don’t need an external ECM jammer.
Recently the squadron took delivery of the more advanced AN/AAQ-33 SNIPER pods for advanced targeting. They also acquired Israeli-build SNIPER-2000 advanced smart weapons to further expand the possibilities of their air-to-ground mission.