Which agency documented the Mantell F-51 Pursuit — Pilot KIA case?

DoD is the primary agency that documented this UAP incident, indexed as file DOD-023 in the Now Declassified archive. The original source context is available via NARA RG 615 / OSD.

Where did the Mantell F-51 Pursuit — Pilot KIA UAP sighting occur?

The Mantell F-51 Pursuit — Pilot KIA incident occurred in Godman Army Airfield, Fort Knox, Kentucky, USA in 1948. The region classification is North America.

What shape was the UAP in the Mantell F-51 Pursuit — Pilot KIA incident?

The UAP documented in the Mantell F-51 Pursuit — Pilot KIA incident was classified as disc / saucer shaped. Classification: SECRET. Altitude: 30,000+ ft.

What behaviors were observed in the Mantell F-51 Pursuit — Pilot KIA case?

Observed behaviors in the Mantell F-51 Pursuit — Pilot KIA incident included: Stationary Hover, Rapid Acceleration. Duration: ~90 minutes. Witnesses: Captain Thomas Mantell and three F-51 pilots; Godman Field tower personnel.

HOME›INCIDENTS›DOD-023

SECRET

DOD-023 · 1948-01-07

Mantell F-51 Pursuit — Pilot KIA

DOD-023is this archive's internal reference, not an official government file number, and the SECRET tag is an editorial archival label — not a current U.S. classification. Now Declassified is an independent index and is not affiliated with the U.S. government. See the original records via NARA RG 615 / OSD.

DoD◎ Godman Army Airfield, Fort Knox, Kentucky, USA◌ North America #1948 ◈ Disc / Saucer↑ 30,000+ ft⏱ ~90 minutes

EVIDENCE GALLERY

Visual reconstruction and recovered media extracted from the incident dossier. This case includes still evidence and analytical reconstruction.

Representative official gallery image traced to an official public-source archive

Cinematic archive imagery for Mantell F-51 Pursuit — Pilot KIA — intelligence record illustration

DoDDISC / SAUCER

ARCHIVE GALLERY

DOD-023NORTH AMERICA

Recovered visual evidence

MEDIA STATUS

Official gallery media is shown as representative archive context for this case.

SOURCE TYPE

Witness testimony, radar language, and dossier reconstruction.

VIEW MODE

Still view highlights silhouette, environment, and encounter geometry.

AT A GLANCE

USAF Captain Thomas Mantell died when his F-51 Mustang disintegrated at 30,000 ft while pursuing a large, metallic, stationary object over Fort Knox. Godman Field tower personnel and multiple pilots observed the object. Project Sign classified the incident SECRET. No official explanation has been accepted.

PRIMARY WITNESSES

Captain Thomas Mantell and three F-51 pilots; Godman Field tower personnel

EVIDENCE PROFILE

VISUAL RECONSTRUCTIONDISC / SAUCER

FILE ID

DOD-023

DATE

1948-01-07

AGENCY

DoD

REGION

North America

SHAPE

Disc / Saucer

ALTITUDE

30,000+ ft

OBSERVED BEHAVIORS

Stationary HoverRapid Acceleration

DECLASSIFIED DETAILS

On January 7, 1948, the Kentucky State Police and Godman Army Airfield tower personnel tracked a large circular object hovering over Fort Knox. Four F-51 Mustangs from the 165th Fighter Squadron were vectored to intercept. Captain Thomas Mantell, a decorated WWII veteran, reported the object as 'tremendous in size' and 'metallic and tremendous in speed.' He climbed in pursuit past 22,000 feet without oxygen equipment. His aircraft broke apart at approximately 30,000 feet. Mantell was killed. The other three pilots broke off the pursuit earlier due to fuel and oxygen constraints. Project Sign (which became Project Blue Book) investigated under SECRET classification. The object was initially attributed to a Venus sighting, then to a classified Skyhook balloon — neither explanation fully accounts for the documented altitude, duration, or appearance. The incident was the first UAP-related fatality documented in the official USAF record.

KEY CHARACTERISTICS

›Large metallic circular object observed hovering over Fort Knox
›Object described as 'tremendous in size' by pursuing pilot
›Captain Mantell's F-51 disintegrated above 30,000 ft
›Observed simultaneously by tower personnel and four fighter pilots
›Project Sign classified the case SECRET
›First UAP-related military fatality in official USAF records

ORIGINAL SOURCE

This incident is indexed as file DOD-023inside Now Declassified's research layer. The nearest official source trail for this agency points to NARA RG 615 / OSD, where archive records, imagery, or supporting context are published for public review.

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INCIDENT DATA

FILE IDDOD-023

DATE1948-01-07

YEAR1948

AGENCYDoD

LOCATIONGodman Army Airfield, Fort Knox, Kentucky, USA

REGIONNorth America

SHAPEDisc / Saucer

ALTITUDE30,000+ ft

DURATION~90 minutes

WITNESSESCaptain Thomas Mantell and three F-51 pilots; Godman Field tower personnel

OBSERVED BEHAVIORS

Stationary Hover→Rapid Acceleration→

EVIDENCE STRENGTH

PARTIAL

Video Record

Still Imagery

Witness Credibility

Sensor Corroboration

Physical Evidence

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ARCHIVE EXPORT

RESEARCH GUIDES

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DOD-023

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Cinematic archive imagery for Farmington New Mexico — Fleet of 500 Discs — intelligence record illustration

DoD

ARCHIVE GALLERY

DOD-040NORTH AMERICA

Farmington New Mexico — Fleet of 500 Discs

DoD◎ Disc / Saucer

UNCLASSIFIED

DOD-040 · 1950-03-17

Farmington New Mexico — Fleet of 500 Discs

◎Farmington, New Mexico, USA

Approximately 500 Farmington, New Mexico residents simultaneously observed a massive fleet of hundreds of disc-shaped objects flying in formation overhead for 30 minutes. Three local newspaper reporters independently witnessed the event and filed reports. The objects were documented at high altitude traveling at high speed in formation, with individual objects breaking formation and rejoining. Project Blue Book declined to investigate.

FORMATIONHOVERINGRAPID ACCELERATION

Edwards AFB — Test Pilots and Tower Report Disc

DoD◎ Disc / Saucer

CONFIDENTIAL

DOD-043 · 1965-10-07

Edwards AFB — Test Pilots and Tower Report Disc

◎Edwards Air Force Base, California, USA

Edwards AFB control tower controllers and multiple F-104 Starfighter test pilots observed a metallic disc maneuvering over the base at high altitude. The object was tracked visually by tower personnel and by pilots in flight. Project Blue Book investigated and logged the case as 'unidentified.' The encounter is notable for occurring at the USAF's primary aircraft test facility with multiple trained military aviators as witnesses.

HOVERINGRAPID ACCELERATIONDISAPPEARED INSTANTLY

Portage County Police UAP Pursuit

DoD◎ Disc / Saucer

UNCLASSIFIED

DOD-028 · 1966-04-17

Portage County Police UAP Pursuit

◎Portage County, Ohio, USA

Two Portage County Sheriff's deputies pursued a luminous disc-shaped object for 85 miles across Ohio into Pennsylvania, joined mid-pursuit by officers from multiple jurisdictions. Project Blue Book attributed the object to Venus — an explanation the officers publicly disputed, triggering congressional scrutiny of the Blue Book program.

HOVERINGRAPID ACCELERATION

INSUFFICIENT

◈ MEDIA

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RESEARCHER DISCUSSION

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