1198th Operational Evaluation and Training Squadron

The 1198th OE&TS was active from 1965-1972 and conducted the initial testing of Lockheed C-130 Hercules transports modified for special operations. Discrete C-130 Hercules modification tests were conducted out of Area II at Norton AFB, California in the late 1960s, with the 1198th OE&TS operating four highly-classified C-130E(I) special operations test beds modified at Lockheed Air Services, at near-by Ontario Airport under Projects Thin Slice/Heavy Chain.