NARA Blue Book: 701 Residual “Unidentified”
Air Force Fact Sheet via NARA: 12,618 sightings (1947–1969); 701 remain Unidentified; project ended 17 Dec 1969.
Sources archives.gov Blue Book overview; NARA UAP textual/microfilm topic pages; catalog.archives.gov series 597821 (sanitized Blue Book case files)
The National Archives hosts the Air Force’s Project Blue Book fact sheet language that still structures public memory of the 1947–1969 investigation: 12,618 sightings processed; 701 left labeled Unidentified; project terminated 17 December 1969. Records live at NARA; there is no open Air Force investigative shop behind the brand name.
Residual is a label
“Unidentified” in Blue Book usage is an Air Force residual category, not a Ledger endorsement of extraterrestrial craft. Batch-6 press recirculation in September 2026 put the framing back in circulation beside PURSUE clips — useful timing for an archival cite file. Status cited.
Evidence ledger
Each claim in this file, the source it rests on, and how well it holds up: 3 corroborated · 1 debunked. What the labels mean.
| Claim | Source | Type · date | Status |
|---|---|---|---|
| Project Blue Book processed 12,618 sightings and left 701 as ‘Unidentified’. | archives.gov Blue Book overview | museum / archive | corroborated |
| Project Blue Book ended on 17 December 1969. | archives.gov Blue Book overview | museum / archive · 1969 | corroborated |
| ‘Unidentified’ means the Air Force concluded those were extraterrestrial craft.It's a leftover category. | archives.gov Blue Book overview | museum / archive | debunked |
| The sanitized case files are available at NARA. | catalog.archives.gov series 597821 | museum / archive | corroborated |
Discussion
Discussions activating. Per-case threads will embed here once the Giscus GitHub App is installed on the public satellite repo.
Meanwhile, join the conversation on GitHub Discussions: https://github.com/dclewis21/anomaly-ledger-community/discussions
CoS / D.C.: see Community guidelines and
SETUP.mdin the site repo for the one-click Giscus install.