Following the growing wave of UFO sightings in the late 1940s, the U.S. Air Force launched Project Grudge — a controversial and short-lived investigation into unidentified flying objects. Officially established in February 1949 as the successor to Project Sign, Project Grudge sought not only to examine UFO reports, but also to calm rising public concern surrounding the phenomenon. The project formally ended in December 1949, paving the way for the later and far more famous Project Blue Book in 1952.

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Unlike its predecessor, Project Grudge approached the UFO issue with deep skepticism from the outset. The project’s primary objective was to convince both military personnel and the public that UFO sightings were neither extraordinary nor evidence of advanced technology. Investigators attributed reported sightings to ordinary explanations such as conventional aircraft, weather balloons, stars, planets, meteors, optical illusions, solar reflections, and even “large hailstones.” Officials involved in the project argued that continued government interest in UFOs was actually fueling public fear and contributing to what they described as a growing atmosphere of “war hysteria.”

 

On December 27, 1949, the Air Force officially announced the termination of Project Grudge.

 

In August 1949, the project released its only formal report, which firmly dismissed the idea that UFOs posed any threat to national security. The report concluded that there was no evidence suggesting the objects were linked to advanced foreign technology or secret scientific developments. Instead, investigators claimed that UFO reports stemmed from several more mundane causes:

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1. Misidentification of ordinary objects or natural phenomena

2. A mild form of mass hysteria fueled by Cold War anxieties

3. Hoaxes created by individuals seeking attention or publicity

4. Reports originating from psychologically disturbed individuals

 

The report also recommended that Air Force personnel receive basic training in astronomy to help reduce future misidentifications of celestial objects.

 

Project Grudge’s conclusions were reinforced in the media by journalist Sidney Shallet, whose two-part article published in the Saturday Evening Post on April 30 and May 7, 1949 echoed the Air Force’s position. The articles argued that most UFO sightings could be explained through conventional means and suggested that hoaxes and sensationalism played a major role in spreading UFO stories.

 

Despite the Air Force’s official stance, Project Grudge quickly became the target of criticism from some of the very people involved in UFO investigations. Astronomer and ufologist J. Allen Hynek condemned the project, later describing it as “less science and more of a public relations campaign.” Former Air Force intelligence officer Edward J. Ruppelt was equally critical, arguing that the military was actively attempting to discredit the extraterrestrial hypothesis. Both men believed Project Grudge fell far short of an objective scientific investigation and instead served primarily as an effort to dismiss and downplay the UFO phenomenon.