Documents / FOIA release
This Defense Intelligence Agency release gathers Army and Air Force intelligence reports on unidentified flying objects from several countries. It contains translated Finnish Border Guard reports of glowing spheres and lights seen near the Soviet border, a Costa Rica sighting near Puntarenas, and Afghan news items from 1959 on bright objects over Kandahar, Mazar-i-Sharif and Kabul. Other reports describe objects over Kuldja in Sinkiang, China. A 1969 OSI report from Nakhon Phanom, Thailand concludes that a pilot's ground sighting was probably a religious procession carrying ceremonial drums.
“object followed”18 pages
It would not seem necessary for insurgents to use helicopters for crossing into Thailand. Evidence indicates that much of the Thai-Laotian border can be crossed at ground level without a great deal of difficulty, affording a far cheaper, safer and less obvious means of infiltration or exfiltration. Yet Thai military and police agencies continue to report helicopter sightings, or fail to report conflicting information which might derogate claims of helicopter activity. This phenomenon may reflect the fact that the presence of helicopters would be evidence of "externally supported aggression," and provide an explanation of Thailand's insurgent movement which fortuitously permits any possibility of an internal cause. A recent self-analysis by the Thai government Communist-suppression agency in mid-South Thailand provides a notably perceptive insight into a facet of Thai personality which affects additionally the gathering and validity of intelligence information from the field. The report cautions government officials against their prevalent attitude that no report of insurgent activity is sufficiently important to send forward unless it has been bulwarked with references to unidentified support helicopters, transceivers and AK rifles, or the presence of some famous guerilla leader.2 (U) Information coordinated with J-2 USMACTHAI/JUSMAGTHAI. 151D IIR 1 656 0003 69, dated 9 January 1969, file: 56-713/03/5. 2CAS Bangkok FTB 14,475, "Thai Report on Insurgency in the Mid-South, Entitled CSOD's Opinion of the Communist Situation in Mid-South Thailand, dated 11 August 1969".
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FOIA release, from the dia collection. The PDF is mirrored here; the original link is under it. The text was read from the page images by an OCR model; expect the odd misread word. 140 pages are in the text index: search them above, or from the library's search.