The 556th was constituted 3 February 1966.  Following training at Forbes AFB, KS, the
unit deployed to U Tapao AB, Thailand, on 30 June 1966.  In addition to the main unit at U Tapao,
the 556th also established detachments at five other Thai bases. With the exception of a
taxiway-runway-apron complex at Nakhon Phanom AB, the unit concentrated primarily on
construction of dormitories, dining halls, and other facilities. The 556th remained in Thailand
until its inactivation at U Tapao in late 1969.
The following documents were contributed by Ray Minton 556th