Within Caceres UFOs
Was Montanchez a UFO or a Balloon?
The province's strongest official UFO case is also the one most clearly weakened by later balloon analysis.
On this page
- The 1967 pilot sighting
- What the official file recorded
- Why the balloon explanation matters
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Introduction
The Montánchez sighting of 3 June 1967 is the key Cáceres case in Spain’s declassified military UFO record, but it is also a good example of why “officially recorded” does not mean “unexplained for ever”. Military pilots did see and pursue a bright object over the Montánchez area; radar operators treated it seriously; two F-86 fighters were scrambled; and a poor photograph was reportedly taken. Yet the later Air Force assessment judged the most likely explanation to be a French CNES research or weather balloon, not an extraordinary craft.[elojocritico.info]elojocritico.infoOpen source on elojocritico.info.
That makes the case more useful than a simple mystery story. It shows how a dramatic, multi-witness aerial incident can begin as a genuine unidentified object and later be weakened by a mundane explanation. Within Cáceres UFO history, Montánchez matters because it is the province’s clearest official entry, while also being the case that most clearly warns against treating a military file as proof of something exotic.[Biblioteca Virtual Defensa]bibliotecavirtual.defensa.gob.esBiblioteca Virtual Defensa Expedientes OVNIBiblioteca Virtual Defensa Expedientes OVNI
The 1967 pilot sighting
On 3 June 1967, a T-33 aircraft using the call sign Duende 20 was flying from Torrejón towards Talavera la Real with two pilots on board. The declassified file places the event over the Montánchez area and gives the sighting time as 17:20, while the internal summary says the aircraft had taken off from Torrejón at 15:55 Zulu time and was heading for Talavera.[elojocritico.info]elojocritico.infoOpen source on elojocritico.info.
The crew reported a bright object above them as they reached the vertical of Montánchez. In the file summary, it was seen roughly at the aircraft’s 11 o’clock position and about 5,000 feet higher. The pilots tried to climb towards it, but said they could not reach its height and had the impression that it rose as well, though not steadily. That impression of “following” or “escaping” movement is one reason the incident felt more puzzling than a normal distant light.[Internet Archive]archive.orgInternet Archive Full text of "Spanish UFO FilesInternet Archive Full text of "Spanish UFO Files
The aircraft’s own later report added important human detail. The pilots initially considered a parachute, then rejected that idea because of the height. As they climbed in circles beneath the object, they judged it to be bright, silvery and oddly shaped; they thought it might be a balloon, but said its shape and brilliance made them unsure.[Internet Archive]archive.orgInternet Archive Full text of "Spanish UFO FilesInternet Archive Full text of "Spanish UFO Files
What they described was not a clean flying-saucer silhouette. The official summary says different observers saw a changing appearance: a deformed balloon, a pyramid, two cones joined at the base, and other shapes depending on viewing angle. The pilots’ own account described a triangular lower aspect with bright parallel lines and a particularly bright vertex opposite the Sun. This variability is central to the later balloon reading, because a high-altitude balloon and its payload can look very different from different angles and lighting conditions.[Internet Archive]archive.orgInternet Archive Full text of "Spanish UFO FilesInternet Archive Full text of "Spanish UFO Files
What the official file recorded
The Montánchez case was not just a casual sighting later retold in local folklore. The Spanish Air Force file number is 670603, and a later catalogue of the Air Force UFO files lists it as a radar-visual case involving radar, military aircraft observation, a fighter scramble and ground observation. The same catalogue records the final assessment as a French CNES balloon and notes that the file ran to 36 pages.[elojocritico.info]elojocritico.infoOpen source on elojocritico.info.
The operational record shows why the case was taken seriously. According to the file summary, EVA 3 made radar contact with an object apparently orbiting in the Talavera zone at 16:26 Zulu time. EVA 2 later had radar contact at 16:45 Zulu, with a double echo on the height display. At 16:59 Zulu, two F-86 fighters from Torrejón were ordered to scramble, carrying film so they could try to photograph the object.[Internet Archive]archive.orgInternet Archive Full text of "Spanish UFO FilesInternet Archive Full text of "Spanish UFO Files
The radio transcript, though affected by poor OCR in the archived text, captures the uncertainty in real time. The T-33 crew repeatedly described something bright and stationary or nearly stationary. At one point they said it looked like a white, bright balloon; at another, that it had become a white triangle. Control asked whether a scramble was necessary; the crew answered that they did not think so, while still calling it a strange object rather than an aircraft.[Internet Archive]archive.orgInternet Archive Full text of "Spanish UFO FilesInternet Archive Full text of "Spanish UFO Files
The scrambled F-86 pilots did not transform the case into a stronger mystery. They too saw a bright point and one pilot said it had “all the appearance of a balloon” in the transcript. Another exchange has the crew acknowledging that it could be a balloon, though not a round one. This matters because the balloon explanation was not imposed only decades later by sceptics; the possibility was already being discussed by the pilots and controllers during the incident itself.[Internet Archive]archive.orgInternet Archive Full text of "Spanish UFO FilesInternet Archive Full text of "Spanish UFO Files
There were still puzzling details in the file. The summary notes possible radio interference when aircraft passed beneath the object, apparent changes in height, changing shape, and a radar echo. The pilots’ own report says that on two passes beneath the object they lost transmitter, receiver and interphone because of a strong background noise. But the declassification-era assessment treated these as interesting features, not decisive proof of an anomalous craft.[Internet Archive]archive.orgInternet Archive Full text of "Spanish UFO FilesInternet Archive Full text of "Spanish UFO Files
Why the balloon explanation matters
The later Air Force review did not simply wave the case away. It accepted that radar detections from two stations made the presence of a physical object hard to deny. But it also warned that the apparent sudden height changes were not confirmed by height-radar data and could have been a subjective impression caused by changes in apparent shape or size. The review also noted that the original file had not been completed with enquiries to organisations that might have launched a balloon.[Internet Archive]archive.orgInternet Archive Full text of "Spanish UFO FilesInternet Archive Full text of "Spanish UFO Files
That is the crux of the case. The strongest version of the Montánchez story is that military pilots and radar operators encountered a real, high-altitude object that they could not identify at the time. The weaker, better-supported version is that the object behaved like a balloon: slow or nearly stationary horizontal movement, very high altitude, changing apparent shape, bright sunlight reflection, and difficulty for jet aircraft to close with it from below. The official conclusion says that, with reasonable reservations, the pilots’ general impression, the object’s behaviour and its form pointed to a balloon.[Internet Archive]archive.orgInternet Archive Full text of "Spanish UFO FilesInternet Archive Full text of "Spanish UFO Files
CNES is not a vague label in this context. France’s space agency has operated a major balloon programme since the early 1960s; its own current project page says CNES launched its first stratospheric balloons in October 1961, opened the Aire-sur-l’Adour balloon launch centre in 1964, and uses balloons at altitudes of roughly 20 to 40 kilometres for atmospheric, astronomical and technology work.[CNES]cnes.frBalloons | CNESBalloons | CNES
That makes a French scientific balloon a plausible class of explanation for a 1967 high-altitude object seen from Spanish military aircraft. It does not prove, from the public file alone, that a specific named balloon launched by CNES was matched to the Montánchez object. The official listing gives “French CNES balloon” as the valuation, while the declassification summary itself acknowledges that the original case file had not fully consulted the possible balloon-launching organisations. The most careful reading is therefore: plausibly identified as a CNES balloon, but not documented in the public record with a neat launch-to-sighting chain.[elojocritico.info]elojocritico.infoOpen source on elojocritico.info.
What strengthens the case, and what weakens it
The Montánchez incident is stronger than many provincial UFO reports because it involved trained military witnesses, radar attention, an operational response and a preserved official file. Spain’s Defence Virtual Library says the wider declassified collection consists of 80 files and about 1,900 pages on unusual aerial phenomena involving Air Force personnel or material, and the Montánchez entry is the Cáceres item listed in public guides to the archive.[Biblioteca Virtual Defensa]bibliotecavirtual.defensa.gob.esBiblioteca Virtual Defensa Expedientes OVNIBiblioteca Virtual Defensa Expedientes OVNI
The case is weakened, however, by the same file that makes it important. The pilots themselves considered a balloon. The F-86 interception did not produce a clear close-range identification or useful imagery; the summary says only one very poor positive photograph was present, showing merely a luminous point. The aircraft had to break off because of fuel, and the original magnetic tape or copy mentioned in the file was not sent to the later Air Force operational command review.[Internet Archive]archive.orgInternet Archive Full text of "Spanish UFO FilesInternet Archive Full text of "Spanish UFO Files
The radar evidence also needs careful handling. Radar contact supports the idea that something physical or radar-reflective was present, but it does not by itself identify the object as a craft, nor does it settle its size, nature or intent. The file’s own reviewer treated the radar evidence as important while still favouring a balloon explanation and expressing caution about the claimed abrupt height changes.[Internet Archive]archive.orgInternet Archive Full text of "Spanish UFO FilesInternet Archive Full text of "Spanish UFO Files
The radio interference is similar. It is memorable and appears in the pilots’ report, but it is not enough to overturn the balloon reading. The file records interference claims, but also shows that not all aircraft reported the same effect; in one exchange, a fighter pilot replied that he was not experiencing interference when asked about it. That makes the interference a genuine reported detail, but not a reliable signature of an exotic object.[Internet Archive]archive.orgInternet Archive Full text of "Spanish UFO FilesInternet Archive Full text of "Spanish UFO Files
The best reading of Montánchez today
The best evidence-led reading is that Montánchez was a real military encounter with a high-altitude object that was unidentified during the flight, then later judged most likely to have been a French CNES balloon. It should not be filed as a hoax or a simple folk tale, because the official file records pilots, radar, a scramble and operational communications. But it should not be promoted as Cáceres’ strongest evidence for an extraordinary craft either, because the official assessment, witness comments and object behaviour all point back towards a balloon.[elojocritico.info]elojocritico.infoOpen source on elojocritico.info.
For the wider Cáceres UFO story, Montánchez is valuable precisely because it sits between mystery and explanation. It shows how a sighting can be dramatic at the moment of observation and still become less mysterious after technical review. It also helps separate the province’s documented record from later, looser sighting lore: the strongest official case in Cáceres is not the one that proves the most, but the one that best shows how an unknown can shrink under later analysis.
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Endnotes
1.
Source: elojocritico.info
Link:https://elojocritico.info/los-archivos-ovni-del-ejercito-del-aire-desglosados-quien-que-como/
2.
Source: archive.org
Title: Internet Archive Full text of “Spanish UFO Files”
Link:https://archive.org/stream/SpanishUFOFiles/1967-06-03avistamiento_en_montanchez%28badajoz%29_djvu.txt
3.
Source: cnes.fr
Title: Balloons | CNES
Link:https://cnes.fr/en/projects/balloons
4.
Source: cnes.fr
Title: mag 89 ballons fr
Link:https://cnes.fr/sites/default/files/2024-08/cnesmag-89-ballons-fr.pdf
5.
Source: archive.org
Title: Spanish UFOFiles
Link:https://archive.org/details/SpanishUFOFiles
6.
Source: archive.org
Link:https://archive.org/download/jufoh/jufoh.pdf
7.
Source: bibliotecavirtual.defensa.gob.es
Title: Biblioteca Virtual Defensa Expedientes OVNI
Link:https://bibliotecavirtual.defensa.gob.es/BVMDefensa/exp_ovni/es/micrositios/inicio.do
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Source: bibliotecavirtual.defensa.gob.es
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Source: bibliotecavirtual.defensa.gob.es
Title: defensa.gob.es Listado de títulos
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10.
Source: bibliotecavirtual.defensa.gob.es
Title: defensa.gob.es Revista de historia militar
Link:https://bibliotecavirtual.defensa.gob.es/BVMDefensa/exp_ovni/es/publicaciones/verNumero.do?anyo=1961&idPublicacion=85
11.
Source: bibliotecavirtual.defensa.gob.es
Title: defensa.gob.es Búsqueda avanzada de obras
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Source: bibliotecavirtual.defensa.gob.es
Link:https://bibliotecavirtual.defensa.gob.es/BVMDefensa/exp_ovni/en/publicaciones/verNumero.do?idNumero=44342
13.
Source: bibliotecavirtual.defensa.gob.es
Link:https://bibliotecavirtual.defensa.gob.es/BVMDefensa/exp_ovni/es/publicaciones/verNumero.do?anyo=1988&idPublicacion=85
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Source: bibliotecavirtual.defensa.gob.es
Title: defensa.gob.es Búsqueda de obras
Link:https://bibliotecavirtual.defensa.gob.es/BVMDefensa/exp_ovni/es/consulta/busqueda.do
15.
Source: bibliotecavirtual.defensa.gob.es
Title: defensa.gob.es Revista de historia militar
Link:https://bibliotecavirtual.defensa.gob.es/BVMDefensa/exp_ovni/es/publicaciones/verNumero.do?anyo=2013&idPublicacion=85
16.
Source: bibliotecavirtual.defensa.gob.es
Title: defensa.gob.es Revista de historia militar
Link:https://bibliotecavirtual.defensa.gob.es/BVMDefensa/exp_ovni/es/publicaciones/verNumero.do?anyo=2024&idPublicacion=85
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Source: bibliotecavirtual.defensa.gob.es
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Additional References
18.
Source: youtube.com
Title: The UFO that Shocked an Entire Continent
Link:https://www.youtube.com/watch?v=V10Q9AWsOfY
Source snippet
Mantell UFO Incident: An Invisible Air Wall? - Enigmas of the World - Néstor Armando Alzate...
19.
Source: youtube.com
Title: Former Military Radar Technician Reacts to Newly Declassified UAP Evidence
Link:https://www.youtube.com/watch?v=nbC6dFb35Jo
Source snippet
The UFO that Shocked an Entire Continent - Manises UAP incident in Europe...
20.
Source: youtube.com
Title: Mantell UFO Incident: An Invisible Air Wall?
Link:https://www.youtube.com/watch?v=WdwznY2Cq2I
Source snippet
The BIGGEST Government Coverup in UFO History...
21.
Source: youtube.com
Title: The BIGGEST Government Coverup in UFO History
Link:https://www.youtube.com/watch?v=l9pURrj5BTY
Source snippet
HISTORY of UFOs - Episode 2 - The 1940s and 1950s - The Roswell Incident and Project Blue Book...
22.
Source: war.gov
Link:https://www.war.gov/medialink/ufo/061226/release_03/documents/CIA-UAP-016-Sightings_of_Unidentified_Flying_Ojbects_in_Ladakh_Nepal_Sikkim_and_Bhutan.pdf
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Source: extremaduramisteriosa.com
Link:https://www.extremaduramisteriosa.com/el-hombre-verde-de-talavera-la-real
24.
Source: facebook.com
Link:https://www.facebook.com/groups/BadajozDebatesUrbanos/posts/4457329511157128/
25.
Source: institut-francais-histoire-espace.org
Link:https://institut-francais-histoire-espace.org/publications/les-ballons-au-service-de-la-recherche/
26.
Source: magreen1976.blogspot.com
Link:https://magreen1976.blogspot.com/2016/10/futbol-copa-del-rey-cultural-leonesa-1.html
27.
Source: verne.elpais.com
Link:https://verne.elpais.com/verne/2016/10/25/articulo/1477394008_803441.html
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