A provisional fighter unit hurried into Taegu after a brief formative period in Japan. The Fifth Air Force established Detachment 1 of the 36th Fighter-Bomber Squadron at Itazuke on 27 June, equipped the detachment-better known by its code name of BOUT-ONE - with F-51's, and moved it to Taegu.
At the same time the Thirteenth Air Force was forming another F-51 squadron, utilizing the personnel of the 12th Fighter-Bomber Squadron. This so-called DALLAS squadron left Clark on 10 July, was flown to Johnson where it picked up F-51's, and by 15 July it had flown its first missions in combat. These two provisional units were combined at Taegu on 10 July as the 51st Fighter Squadron, Single Engine (Provisional).