The Gaps in Viet Nam's UFO Record
Vietnam has a small but unusually varied UFO record: wartime military logs, disputed combat stories, civilian photographs and videos, an unexplained mid-air explosion over Phu Quoc, and objects initially described as mysterious before being identified as probable space debris. The central finding is less dramatic than many online retellings suggest.
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Introduction
The best-supported incidents are valuable for a different reason. They show how “unidentified” can mean several things: a brief observation lacking enough data, a conventional aircraft seen under poor conditions, friendly fire confused by battlefield reports, or debris whose origin had not yet been traced. Vietnam’s public record is also fragmented. The clearest wartime documents are held mainly in American and Australian archives, while later Vietnamese cases are scattered across state-linked news reports rather than a searchable national UFO investigation archive.[archives.gov]text-message.blogs.archives.govThe Text Message No Enemy Contact, but Alien Contact… – The Text MessageThe Text Message No Enemy Contact, but Alien Contact… – The Text Message
What the chronology actually shows
Vietnam’s reported UFO history does not form a continuous sequence of investigated cases. Instead, it falls into three broad phases: ambiguous observations during the Vietnam War, anecdotal civilian sightings from the 1990s onwards, and modern incidents in which official investigation increasingly pointed towards aircraft or space hardware.
June 1968 — the waters near the demilitarised zone. A confusing series of night-time events involved reports of hostile helicopters, the sinking of the patrol boat PCF-19 and missile attacks on the Australian destroyer HMAS Hobart and the American cruiser USS Boston. Later UFO literature often combined these events into a single story in which unexplained lights or exotic craft attacked Allied vessels. Official histories support a more conventional and tragic reconstruction: HMAS Hobart was struck by American Sparrow missiles fired by US Air Force F-4 Phantom aircraft. Two Australian sailors were killed and eleven wounded. Missile fragments and the subsequent Seventh Fleet inquiry identified the attack as friendly fire.[Naval History and Heritage Command]history.navy.milNaval History and Heritage Command H-019-1 Swift Boat DisappearanceNaval History and Heritage Command H-019-1 Swift Boat Disappearance
The loss of PCF-19 remains more disputed. The official inquiry also blamed American aircraft, partly because investigators found no independent confirmation that North Vietnamese helicopters had been present. Some surviving witnesses nevertheless maintained that they had seen aircraft or lights behaving like helicopters. That unresolved disagreement helped later writers turn a complicated combat-identification failure into a UFO narrative. It does not, however, overturn the physical evidence identifying the weapons that struck Hobart.[Naval History and Heritage Command]history.navy.milNaval History and Heritage Command H-019-1 Swift Boat DisappearanceNaval History and Heritage Command H-019-1 Swift Boat Disappearance
6 January 1969 — Chu Lai. A daily journal from the US Army’s Chu Lai Defence Command contains Vietnam’s clearest archival UFO-style report. At 1.52 am, an observation tower reported a silent, glowing, egg-shaped object about 15 to 20 feet across. It was said to move slowly, descend near an ammunition supply area and remain invisible to the control tower’s radar. The duty officer was informed, but the surviving journal records no investigation, photographs, radar trace, material evidence or later witness interviews.[The Text Message]text-message.blogs.archives.govThe Text Message No Enemy Contact, but Alien Contact… – The Text MessageThe Text Message No Enemy Contact, but Alien Contact… – The Text Message
The Chu Lai entry is important because it is contemporary rather than a memory recorded decades later. Yet its evidential limits are severe. It is a brief operational note written at second hand, with no named witnesses and no measured distance or altitude. Suggested explanations have included a flare, battlefield illumination, an observational error, fabricated reporting and an unusual atmospheric phenomenon. None can be demonstrated from the surviving record. The case is therefore legitimately unidentified, but “unidentified” here means that the available information is insufficient—not that an extraordinary craft was established.[The Text Message]text-message.blogs.archives.govThe Text Message No Enemy Contact, but Alien Contact… – The Text MessageThe Text Message No Enemy Contact, but Alien Contact… – The Text Message
Summer 1991 — Dong Nai province. A later press retrospective described a blogger’s childhood recollection of a column of red fire rising near trees in a village in Thong Nhat district. No photograph, physical trace, independent witness statement or contemporary report was presented. The account remained unexplained in the limited sense that nobody had enough information to reconstruct it. Its delayed, single-witness nature makes it one of Vietnam’s weakest widely repeated UFO claims.[VietNamNet News]vietnamnet.vnViet Nam Net News UFOs many times appeared in Vietnam?Viet Nam Net News UFOs many times appeared in Vietnam?
28 October 2010 — Hanoi. A photograph showed a luminous object or streak that appeared to be burning in the sky. Nguyen Duc Phuong, identified in Vietnamese reporting as an astronomy specialist, assessed it as a civilian aircraft. This is a useful example of how an object may remain visually strange to a photographer while being recognisable to someone familiar with aircraft lighting, perspective and atmospheric effects.[VietNamNet News]vietnamnet.vnViet Nam Net News UFOs many times appeared in Vietnam?Viet Nam Net News UFOs many times appeared in Vietnam?
July 2011 — Ho Chi Minh City. A short video recorded a light moving slowly before fading. The person who uploaded it did not claim certainty that it was a UFO, and the available report offered no corroborating radar data, precise direction, weather information or independent recordings. As with many urban light videos, the evidence is too limited to distinguish confidently between an aircraft, lantern, balloon, distant light source or camera artefact.[VietNamNet News]vietnamnet.vnViet Nam Net News UFOs many times appeared in Vietnam?Viet Nam Net News UFOs many times appeared in Vietnam?
January 2016 — Yen Bai and Tuyen Quang provinces. Three metal spheres fell in northern Vietnam, including one that landed on a house and a larger object found in a maize field. Their scorched surfaces and unexpected arrival encouraged “space ball” and UFO speculation. The Ministry of Defence’s initial assessment was much more specific: the objects were non-radioactive, non-explosive compressed-air tanks from a flying device, probably a launch vehicle. They had been manufactured in Russia, although investigators had not yet established which country operated the vehicle.[VietNamNet News]vietnamnet.vnOpen source on vietnamnet.vn.
This 2016 case is the clearest debunked or substantially resolved incident in Vietnam’s modern record. The objects were real and initially unidentified, but inspection converted a mystery into an aerospace-debris investigation. It illustrates why recovering material is so valuable: composition, manufacture and engineering function can be tested in ways that eyewitness impressions cannot.
Phu Quoc remains the strongest civilian-era mystery
On 27 May 2008, residents around Phu Quoc Island heard a large explosion and recovered pieces of grey metal. Vietnamese state reporting placed the event at about 10.20 am, while witnesses across the nearby Cambodian coast also reported hearing an explosion. Soldiers and local militia searched for wreckage and possible survivors. Airlines and authorities in Vietnam, Cambodia and Thailand reported no missing civilian aircraft.[Reuters]reuters.comVietnam reports "UFO" explosion | ReutersVietnam reports "UFO" explosion | Reuters…
Early headlines described a “UFO explosion”, but the terminology meant an unidentified flying object in the literal sense. It did not amount to an official claim about an alien craft. By 29 May, the Phu Quoc district military command had recovered eleven pieces and assessed them as fragments of an aircraft body. One reported fragment was about 1.5 metres long.[Reuters]reuters.comVietnam reports "UFO" explosion | ReutersVietnam reports "UFO" explosion | Reuters…
The remaining uncertainty concerns identity, not necessarily nature. Public reports did not establish a registration, operator, flight plan or definitive vehicle type. Possibilities include unreported military hardware, part of an aircraft or missile, or aerospace debris breaking up in the atmosphere. A meteor alone would not readily account for manufactured metal fragments, while the recovered pieces weaken claims that witnesses merely heard thunder or a ground explosion.
Phu Quoc consequently ranks above ordinary light sightings because it involved multiple witnesses, a search operation and physical debris. Even so, it falls short of strong evidence for an anomalous vehicle. No publicly available analysis has demonstrated unusual alloys, impossible engineering, non-human manufacture or flight behaviour beyond the initial explosion. The most defensible classification is a probable conventional aerospace breakup whose precise source was not publicly identified.[Reuters]reuters.comVietnam reports "UFO" explosion | ReutersVietnam reports "UFO" explosion | Reuters…
Why the wartime stories became distorted
The Vietnam War created almost ideal conditions for misidentification. Aircraft flew at night and at different altitudes; flares, tracers, rockets and anti-aircraft fire produced moving lights; radar coverage was incomplete; and forces had to make rapid decisions with uncertain information. Secret or poorly understood technology, including drones and electronic-warfare systems, added further ambiguity.
The June 1968 naval incidents demonstrate how separate events can merge in later storytelling. Reports of possible enemy helicopters, the sinking of PCF-19, lights seen near the coast and the subsequent attack on HMAS Hobart were close enough in time and location to become one dramatic sequence. Archival reconstruction separates them and identifies American missiles in the Hobart strike.[Naval History and Heritage Command]history.navy.milNaval History and Heritage Command H-019-1 Swift Boat DisappearanceNaval History and Heritage Command H-019-1 Swift Boat Disappearance
The term “enemy helicopter” also carried uncertainty. North Vietnamese helicopter operations near the demilitarised zone would have been militarily significant, and an aircraft lacking identification signals could be treated as hostile. Yet an unidentified track or light in a combat report was not necessarily a visually confirmed helicopter. Once later UFO writers substituted “unknown craft” for “unconfirmed aircraft”, the language began to imply something more exotic than the original records supported.
Wartime testimony should not be dismissed simply because conditions were difficult. Military observers sometimes had relevant training, and operational logs were created for practical rather than entertainment purposes. But combat also introduces stress, fragmented observation, classified activity and institutional incentives to assign or avoid blame. The correct approach is to compare testimony with weapon fragments, radar records, unit journals, flight logs and subsequent inquiries rather than treating witness status as proof by itself.
Official records are real but incomplete
There is no readily accessible evidence of a Vietnamese equivalent to the United States Air Force’s former Project Blue Book: a central, publicly indexed programme collecting national UFO reports and publishing case dispositions. The visible Vietnamese record instead consists of incident-specific military or government responses, press coverage and comments from astronomers or aviation specialists.
For Vietnam War cases, some of the most useful material survives abroad. The Chu Lai account is in US Army records held by the US National Archives. The Hobart attack is documented by the Australian War Memorial, the Royal Australian Navy and US naval historians. CIA collections contain large quantities of UFO-related material, but the agency itself describes much of its historical collection as foreign press reporting, public correspondence and administrative discussion rather than proof of extraordinary vehicles.[archives.gov]text-message.blogs.archives.govThe Text Message No Enemy Contact, but Alien Contact… – The Text MessageThe Text Message No Enemy Contact, but Alien Contact… – The Text Message
This archival geography matters. A document being “declassified” or stored by an intelligence agency does not authenticate every claim inside it. Archives preserve reports, rumours, translations and unanswered questions as well as established facts. The evidential weight lies in what a record contains: named witnesses, contemporaneous measurements, sensor data, recovered material and a traceable chain of custody.
Vietnamese local reporting is indispensable for modern cases, particularly Phu Quoc and the 2016 spheres. It records official statements, recovery locations and the progression from uncertainty towards identification. Its limitations include brief follow-up cycles, inconsistent use of the word “UFO”, and the disappearance or inaccessibility of older web pages. English-language reports often repeat an early sensational headline without carrying the later Vietnamese detail that the debris appeared to be conventional aircraft or rocket hardware.[reuters.com]reuters.comVietnam reports "UFO" explosion | ReutersVietnam reports "UFO" explosion | Reuters…
Claims, explanations and evidence in Viet Nam’s UFO record
A useful assessment separates the existence of an incident from claims about its cause.
Confirmed events
- A US Army journal recorded an unusual silent, glowing object at Chu Lai on 6 January 1969. The observation is documented, although the object’s nature is not.[The Text Message]text-message.blogs.archives.govThe Text Message No Enemy Contact, but Alien Contact… – The Text MessageThe Text Message No Enemy Contact, but Alien Contact… – The Text Message
- HMAS Hobart was struck by American missiles on 17 June 1968, killing two sailors. The attack was friendly fire, not a confirmed attack by a UFO.[Naval History and Heritage Command]history.navy.milNaval History and Heritage Command H-019-1 Swift Boat DisappearanceNaval History and Heritage Command H-019-1 Swift Boat Disappearance
- An aerial explosion occurred near Phu Quoc in May 2008, and metal debris assessed as aircraft material was recovered. Its exact source was not publicly established.[Reuters]reuters.comVietnam reports "UFO" explosion | ReutersVietnam reports "UFO" explosion | Reuters…
- Metal spheres fell in northern Vietnam in January 2016. Defence investigators identified them as probable pressure vessels from a launch vehicle rather than alien machinery.[VietNamNet News]vietnamnet.vnOpen source on vietnamnet.vn.
Contested or genuinely unresolved claims
- The Chu Lai object remains unidentified because the surviving report is too brief to test competing explanations.
- The precise cause of PCF-19’s destruction has been disputed by witnesses, although the official inquiry attributed it to friendly fire.
- The operator and vehicle associated with the Phu Quoc debris were not publicly identified in the available reporting.
- The 1991 Dong Nai story remains unexplained but is based on an uncorroborated retrospective account rather than a documented investigation.[Naval History and Heritage Command]history.navy.milNaval History and Heritage Command H-019-1 Swift Boat DisappearanceNaval History and Heritage Command H-019-1 Swift Boat Disappearance
Debunked or substantially explained claims
- The 1968 attack on HMAS Hobart was not evidence that a mysterious craft fired on the ship; American missile components established the source of the strike.
- The 2010 Hanoi photograph was assessed by a Vietnamese astronomy specialist as showing a civilian aircraft.
- The 2016 “space balls” were identified as manufactured pressure tanks associated with aerospace equipment.[navy.mil]history.navy.milNaval History and Heritage Command H-019-1 Swift Boat DisappearanceNaval History and Heritage Command H-019-1 Swift Boat Disappearance
Regional patterns reflect observation conditions
Vietnam’s reported cases show some geographical clustering, but the pattern is better explained by military activity, population and recovery opportunities than by evidence of a persistent anomalous presence.
Central Vietnam, especially the former wartime zone around Chu Lai, Da Nang and the demilitarised zone, dominates the military record. This was an intensely monitored battlespace filled with aircraft, radar stations, flares and naval operations. The high number of potential stimuli—and the existence of detailed American and Allied records—makes reports there more likely to survive.
The south contributes Vietnam’s most notable post-war physical-debris case at Phu Quoc, along with anecdotal reports from Dong Nai and urban videos from Ho Chi Minh City. Phu Quoc’s position near international airspace and the Cambodian coast complicated immediate identification, while its inhabited coastline made falling debris more likely to be noticed and collected.[reuters.com]reuters.comVietnam reports "UFO" explosion | ReutersVietnam reports "UFO" explosion | Reuters…
Northern Vietnam’s best-documented modern event involved the 2016 pressure vessels found in Yen Bai and Tuyen Quang. Hanoi has generated photographic reports, but dense air traffic, illuminated aircraft and camera effects provide a broad pool of conventional explanations. The northern sphere case also shows that rural areas can produce stronger evidence than cities when objects physically reach the ground and can be examined.[VietNamNet News]vietnamnet.vnOpen source on vietnamnet.vn.
These regional differences should not be interpreted as a map of UFO activity. They are primarily a map of wartime surveillance, settlement, air routes, press attention and whether recoverable material was present.
How to judge a Vietnamese UFO claim
The strongest Vietnamese cases are those with contemporary documents or recovered debris, but even they require careful grading. A practical assessment should ask:
- Was the report recorded at the time? The Chu Lai journal is stronger than a childhood memory published decades later.
- Were there independent witnesses or sensors? Multiple witnesses help, but radar, photographs from separate positions and flight records are more useful than repeated versions of one account.
- Was physical material recovered under documented custody? The Phu Quoc fragments and 2016 spheres permit technical investigation; a blurry light does not.
- Did later reporting change the initial story? Early “UFO” headlines often precede identification as aircraft or rocket debris.
- Does the source distinguish unknown from extraordinary? An unidentified object is simply one that has not yet been identified.
- Are claims copied from archives or merely attributed to them? A genuine archive reference should lead to a specific journal, report, photograph or file, not just a statement that “declassified records prove” the event.
- Are conventional explanations tested rather than merely named? A credible analysis should compare timing, direction, weather, known flights, astronomical objects and debris characteristics with the witness account.
By these standards, Vietnam has several authentic UFO reports but no high-quality case combining multiple calibrated sensors, clear imagery, recovered material of anomalous manufacture and a transparent investigation. The country’s record is best understood as a collection of unresolved observations and initially mysterious aerospace incidents, not as evidence of confirmed extraterrestrial visitation.
The strongest conclusion supported by Viet Nam’s UFO record
Vietnam’s UFO history is neither empty nor as extraordinary as popular retellings imply. The Chu Lai journal preserves a genuinely puzzling wartime observation. Phu Quoc involved a real explosion and real debris whose precise source remained publicly uncertain. Both deserve to be described as unresolved within the limits of the available evidence.
Other prominent stories become less mysterious when the record is reconstructed. The attack on HMAS Hobart was American friendly fire. Hanoi’s photographed object was assessed as an aircraft. Northern Vietnam’s metal spheres were probable launch-vehicle pressure vessels. Anecdotal accounts from Dong Nai and short urban videos contain too little information to support firm conclusions.
The enduring issue is therefore not a hidden abundance of spectacular cases, but the uneven quality and accessibility of the record. Vietnam lacks a visible central public archive joining civilian reports, aviation data, military investigations and technical findings. Until cases are documented with precise times, locations, sensor records and recoverable evidence, the most responsible verdict remains case-specific: some incidents are explained, some are unresolved, and none presently demonstrates an extraterrestrial origin.
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Endnotes
1.
Source: text-message.blogs.archives.gov
Title: The Text Message No Enemy Contact, but Alien Contact… – The Text Message
Link:https://text-message.blogs.archives.gov/2011/06/06/no-enemy-contact-but-alien-contact/
2.
Source: history.navy.mil
Title: Naval History and Heritage Command H-019-1 Swift Boat Disappearance
Link:https://www.history.navy.mil/content/history/nhhc/about-us/leadership/director/directors-corner/h-grams/h-gram-019/h-019-1.html
3.
Source: reuters.com
Title: Vietnam reports “UFO” explosion | Reuters
Link:https://www.reuters.com/article/lifestyle/vietnam-reports-ufo-explosion-idUSBKK88829/
Source snippet
Vietnam reports "UFO" explosion | Reuters...
4.
Source: vietnamnet.vn
Link:https://vietnamnet.vn/en/defence-ministry-releases-initial-conclusion-of-the-unidentified-objects-E149668.html
5.
Source: vietnamnet.vn
Title: Viet Nam Net News UFOs many times appeared in Vietnam?
Link:https://vietnamnet.vn/en/ufos-many-times-appeared-in-vietnam-E55231.html
6.
Source: cia.gov
Link:https://www.cia.gov/readingroom/collection/ufos-fact-or-fiction
Source snippet
UFOs: Fact or Fiction?Most of the documents concern CIA cables reporting unsubstantiated UFO sightings in the foreign press and intra...
7.
Source: news.sky.com
Link:https://news.sky.com/story/ufo-files-latest-new-release-in-us-reveals-reports-of-unexplained-green-orbs-discs-and-fireballs-13543508
8.
Source: archives.gov
Title: Compilation of Periodical Literature: Nixon Library Cluster | National Archives
Link:https://www.archives.gov/research/alic/periodicals/nara-citations/nixon-library.html
9.
Source: archives.gov
Title: Vietnam War | National Archives
Link:https://www.archives.gov/research/vietnam-war
10.
Source: astronomy.com
Title: Our close call with an “alien probe”
Link:https://www.astronomy.com/science/our-close-call-with-an-alien-probe/
11.
Source: cia.gov
Title: How To Investigate a Flying Saucer
Link:https://www.cia.gov/stories/story/how-to-investigate-a-flying-saucer/
12.
Source: infonet.vietnamnet.vn
Link:https://infonet.vietnamnet.vn/khoi-kim-loai-hinh-cau-roi-tai-yen-bai-khong-phai-la-vat-the-la-118839.html
13.
Source: cia.gov
Link:https://www.cia.gov/readingroom/docs/F-2004-01956%20APPEAL%5B16113565%5D.pdf
14.
Source: cia.gov
Link:https://www.cia.gov/readingroom/document/01333876
15.
Source: cia.gov
Title: DOC 0000015452
Link:https://www.cia.gov/readingroom/docs/DOC_0000015452.pdf
16.
Source: cia.gov
Link:https://www.cia.gov/readingroom/docs/DOC_0000838058.pdf
17.
Source: cia.gov
Link:https://www.cia.gov/readingroom/docs/CIA-RDP81R00560R000100010012-8.pdf
18.
Source: cia.gov
Title: CIA RDP81R00560R000100010005 6
Link:https://www.cia.gov/readingroom/docs/CIA-RDP81R00560R000100010005-6.pdf
19.
Source: cia.gov
Link:https://www.cia.gov/readingroom/docs/CIA-RDP90-00965R000707000002-9.pdf
20.
Source: cia.gov
Link:https://www.cia.gov/resources/csi/static/Archangel-CIAs-Supersonic-A-12-Reconnaissance-Aircraft.pdf
21.
Source: cia.gov
Link:https://www.cia.gov/library/abbottabad-compound/5F/5FC9177D115DFAE199E5204183A6F3E2_Rogue_state__By_sout_al_khilafah.pdf
22.
Source: text-message.blogs.archives.gov
Title: rg 472
Link:https://text-message.blogs.archives.gov/tag/rg-472/
23.
Source: text-message.blogs.archives.gov
Link:https://text-message.blogs.archives.gov/category/vietnam/page/2/
24.
Source: text-message.blogs.archives.gov
Title: da nang
Link:https://text-message.blogs.archives.gov/tag/da-nang/
25.
Source: text-message.blogs.archives.gov
Link:https://text-message.blogs.archives.gov/2011/06/
26.
Source: hoover.archives.gov
Title: richard wilson
Link:https://hoover.archives.gov/research/manuscript-collections/richard-wilson
27.
Source: hoover.archives.gov
Link:https://hoover.archives.gov/research/manauscript-collections/hall
28.
Source: hoover.archives.gov
Link:https://hoover.archives.gov/research/manuscript-collections/mason
29.
Source: text-message.blogs.archives.gov
Link:https://text-message.blogs.archives.gov/tag/ufos/
30.
Source: hoover.archives.gov
Link:https://hoover.archives.gov/research/manuscript-collections/parrish
31.
Source: archives.gov
Title: nr20 19
Link:https://www.archives.gov/press/press-releases/2020/nr20-19
32.
Source: awm.gov.au
Link:https://www.awm.gov.au/collection/C1125520
Source snippet
Australian War MemorialHMAS Hobart (II) at Subic Bay naval base, Philippines, after being hit by United States Air Force... | Australian...
33.
Source: tuoitre.vn
Title: TUOI TRE ONLINEVụ nổ trên không ở Phú Quốc: 11 mảnh vỡ là của thân máy bay
Link:https://tuoitre.vn/vu-no-tren-khong-o-phu-quoc-11-manh-vo-la-cua-than-may-bay-260296.htm
Source snippet
Tuổi Trẻ Online...
34.
Source: nominal-rolls.dva.gov.au
Title: dva.gov.au DV A’s Nominal Rolls
Link:https://nominal-rolls.dva.gov.au/vietnamWar
35.
Source: tuoitre.vn
Title: Kết luận ban đầu về vật thể lạ rơi xuống Việt Nam
Link:https://tuoitre.vn/nld/thoi-su-trong-nuoc/bo-quoc-phong-ket-luan-ban-dau-ve-vat-the-la-roi-xuong-viet-nam-20160105131729229.htm
36.
Source: project1947.com
Link:https://www.project1947.com/articles/hobart.htm
37.
Source: seapower.navy.gov.au
Link:https://seapower.navy.gov.au/history/units/hmas-hobart-ii
38.
Source: environment.sa.gov.au
Title: Department for Environment and Water
Link:https://www.environment.sa.gov.au/topics/heritage/maritime-heritage/managing-maritime-heritage/protected-zones/ex-hmas-hobart
39.
Source: Wikipedia
Title: Unidentified flying object
Link:https://en.wikipedia.org/wiki/Unidentified_flying_object
40.
Source: quangninh.gov.vn
Link:https://www.quangninh.gov.vn/So/sotainguyenmt/Lists/TinTuc/Attachments/598/Environmental%20planing%20of%20Quang%20Ninh.pdf
41.
Source: nationalarchives.gov.uk
Link:https://www.nationalarchives.gov.uk/help-with-your-research/research-guides/ufos/
42.
Source: nationalarchives.gov.uk
Link:https://www.nationalarchives.gov.uk/explore-the-collection/explore-by-time-period/postwar/ufo-reports/
43.
Source: vault.fbi.gov
Link:https://vault.fbi.gov/UFO
44.
Source: awm.gov.au
Link:https://www.awm.gov.au/collection/C1300446
45.
Source: navyhistory.au
Title: 17 june 1968
Link:https://navyhistory.au/17-june-1968/
Published: june 1968
46.
Source: navy.gov.au
Title: On the gun line in Vietnam | Royal Australian Navy
Link:https://www.navy.gov.au/about-navy/history/history-milestones/gun-line-vietnam
Additional References
47.
Source: youtube.com
Title: The mysteries surrounding UFO sightings in Vietnam during the war
Link:https://www.youtube.com/watch?v=Ar4biJJHOLQ
Source snippet
Faeries, Ghosts, and High Strangeness in the Vietnam War...
48.
Source: youtube.com
Title: The Forgotten Navy — Australia’s War On The Vietnam Gunline
Link:https://www.youtube.com/watch?v=HIJH38kLGVg
Source snippet
UFOs: Investigating the Unknown MEGA Episode | National Geographic...
49.
Source: youtube.com
Title: 5 Evidences of UFOs Appearing in Vietnam During the War
Link:https://www.youtube.com/watch?v=v8St10PNGZ8
Source snippet
The mysteries surrounding UFO sightings in Vietnam during the war...
50.
Source: youtube.com
Title: Faeries, Ghosts, and High Strangeness in the Vietnam War
Link:https://www.youtube.com/watch?v=MQjdvDNOhH4
Source snippet
The Forgotten Navy — Australia's War On The Vietnam Gunline...
51.
Source: archivesfoundation.org
Link:https://archivesfoundation.org/documents/50-years-ago-government-stops-investigating-ufos/
52.
Source: facebook.com
Link:https://www.facebook.com/groups/USHistoryGroup/posts/3455898334625531/
53.
Source: facebook.com
Link:https://www.facebook.com/groups/149844915349213/posts/2345590165774666/
54.
Source: cnes-geipan.fr
Link:https://www.cnes-geipan.fr/en/missions-methodes-et-resultats
55.
Source: skepticalinquirer.org
Link:https://skepticalinquirer.org/wp-content/uploads/sites/29/2019/03/Issue-02-7.pdf
56.
Source: reddit.com
Link:https://www.reddit.com/r/ufo/comments/ebf57q/the_usg_was_plagued_by_ufos_during_the_vietnam/