 In April/May 1966, following civil unrest in Da Nang, all USAF personnel were moved from off-base housing into barracks on the base.In May 1966, the base supported Operation Carolina Moon an unsuccessful attempt to destroy the Thanh Hóa Bridge with mines dropped from C-130s.By September 1966, the 20th TASS had replaced most of its O-1s with the O-2A with many of these forward deployed to smaller bases close to the DMZ.