Triangular UFOs: An Estimate of the Situation

Triangular UFOs Cover

A word from Richard Dolan:

For years, serious researchers have known that triangular-shaped UFOs are one of the most common types observed. The phenomenon has sparked intense debate among many and excited the imagination of many others. But until now, there has never been a book-length treatment of this fascinating subject.

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Finally, we have one. David Marler has provided a comprehensive analysis of “the triangles.” He has collected, collated, and analyzed hundreds of reports. In the process, he has created a detailed profile of these objects and written a rich narrative of  their history.

Marler is well-suited to the task, having at his disposal an enormous collection of newspaper archives,  declassified military reports, UFO books and journals, and the transcripts of  many first-hand interviews he has conducted. He has also received input from many prominent individuals from within the military, FAA, Aerospace, and UFO research field.

He tackles the arguments made by skeptics that dismiss these triangular UFO reports outright. He also address the claims of so-called insiders who claim these objects are a creation of the U.S. military.

The results of his years of research are documented in his book, Triangular UFOs: An Estimate of the Situation. It is a book that has long been needed, not only by the UFO research community, but the general public, as it opens up an entirely new discussion that has long been ignored: who is making the triangles?

Write to David Marler at

Listen to this 24 minute interview with David Marler about his book.



Introduction by David Marler

Research into the UFO subject is problematic at best. Not only are UFO investigators faced with a myriad of UFO reports that vary as much as the eyewitnesses themselves, but they also have the task of trying to make sense out of the disparate reports and try to find meaning in a sea of confusion.

Starting in the late 1980s, one subset of UFO reports began to gain prominence in the UFO field. These reports involved very large triangular objects. This appeared to be a new trend facing UFO investigators. Today, these ubiquitous reports dominate this field of inquiry. With each passing year, more reports continue to pour in regarding these mysterious objects.

Despite the wealth of eyewitness reports, little had been seriously written on the subject beyond magazine and website articles. I decided to dedicate myself to the task of writing the first comprehensive analysis of triangular UFOs. There needed to be serious work done in this area to not only define the subject matter itself, but examine the historical nature of these reports. This needed to be a narrowly-focused and serious examination of the data that refrained from idle speculation and conspiracy theories. The idea of writing such a book was not a decision I arrived at overnight.

My interest in this particular subset of reports was initially piqued by the now-famous wave of triangular UFOs over Belgium from 1989 to 1991. There were literally hundreds of highly-credible reports of these objects seen over that country in addition to radar confirmation as well. As if the accounts were not intriguing enough, the approach taken by the Belgian military towards the subject publicly was equally compelling. There were no denials or outlandish explanations to rationalize away these reports. They were taking the subject quite seriously.

Despite this intriguing wave of UFO reports, I was confronted with a similar wave of UFO reports that occurred one early morning on January 5th, 2000 over southern Illinois. At the time, I lived in the general area and was well-suited to investigate the case given my proximity to the sighting locations and my background on the subject. Multiple police officers and other eyewitnesses reported seeing a large triangular UFO that was illuminated and behaved in a fashion similar to what was reported in Belgium ten years prior.

Like Belgium, police officers were in radio contact with one another during the sightings and the reports were not summarily dismissed, but taken rather seriously. Most intriguing, was the fact the UFO flew by within one mile of Scott Air Force Base. Unlike Belgium, military officials were not forthcoming with information or answers.

Upon seeing the parallels between the Belgian and southern Illinois reports despite the distances between the two areas and the separation of ten years, I decided to then launch a comprehensive historical analysis to collect, collate, and analyze UFO reports of this type. I have developed a detailed profile of these objects as well as a rich narrative outlining their history.

I incorporated triangular UFO reports derived from various newspaper archives; declassified military reports; UFO books and journals; as well as first-hand interviews. Together, these sources provided a wealth of case material that I analyzed. Coupled with this are contributions by prominent individuals from the military, FAA, and Aerospace field.

I tackle the arguments made by skeptics that dismiss these triangular UFO reports outright. I also address the claims of so-called insiders that claim these UFO reports are a creation of the U.S. military. I also enlist the insights of colleagues in the UFO field for their impressions and thoughts pertaining to this mystery within a mystery.

The results of my years of research are documented in my book: Triangular UFOs: An Estimate of the Situation. This is the first comprehensive book dedicated to the triangular UFO mystery. I hope it serves as the definitive book on this most elusive subject for many years to come.


“Mr Marler has stripped away the aura of confusion and misinformation regarding the UFO subject…Like a seasoned attorney building a case, Marler sets forth on a logical progression of thought that leads the reader through a wealth of case material establishing relevant patterns in the data…For those who have never read a UFO book, this will be a wonderful, level-headed introduction to the subject matter.  For those well read on the subject, this will stand out as one of the classics of UFO research for decades to come.”

Thomas J. Eckhardt

Former Missouri Reperesentative

Missouri State House of Representatives

A Special Note:

To further pique your curiosity and demonstrate the non-terrestrial origins of these early sightings of triangular flying vehicles, David has graciously supplied these clippings from 1950 to 1966 in convenient PDF format.

EarlyTriangular UFO Articles

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