"cheyenne" was constructed as the victory ship ss "middlesex victory" under u.s. maritime commission contract (mcv-693) at oregon shipbuilding corporation, portland, oregon. she was launched on 26 june 1945 and renamed ss "wyoming" in 1947. in 1963, she was placed in-service as usns "cheyenne" (t-ag-174), a "special project ship", manned by the military sea transportation service with a civilian crew.