On 29 January, a local village chief told the security officer of the Naval Support Activity at Camp Tiensha that about 300 VC would attack the Marble Mountain transmitter that night. That same day, the 1st Marine Division notified III MAF that "usually reliable sources" told of staging areas south of Da Nang for an impending attack. Finally, according to Marine intelligence officers, another "very reliable source" flatly stated "that the time of attack throughout MR {Military Region) 5 would be" at 0130 and no later than 0200 on 30 January.

MACV ComdHist 1968, pp. 217, 222-23.

1968 The Definitive Year