Thirteen Ships Went South. They Came Home Six Weeks Early.
Operation Highjump put 4,700 men and an aircraft carrier into Antarctic waters in the summer of 1946. It was the largest expedition ever sent there and it packed up ahead of schedule. The operational records say why, and the answer is ice.
A months-long reporting project. Documents cited below are held in The Vault and available to readers.
COLLEGE PARK, Md. — It was the biggest expedition ever sent to Antarctica. Thirteen ships. Four thousand seven hundred men. An aircraft carrier.
It was announced in a press release in August 1946, and it went home about six weeks ahead of schedule.
The operational records explaining why have been public since the 1940s. As far as the archive's reference staff can tell, nobody had read them end to end.
What went wrong
Ice, immediately and continuously.
Two ships were beset in the first weeks. One took hull damage. Fuel consumption ran above plan because breaking ice burns fuel at a rate that makes a planner unhappy.
On 30 December a seaplane went down on Thurston Island. Three men were killed. The survivors were not recovered for thirteen days.
Why a season ends
Dr. Ingeborg Salvesen-Mbeki was asked to explain the decision, and a retired icebreaker master was asked the same question separately.
Their answers were nearly identical, which our correspondent found more persuasive than either alone.
The pack closes. It closes on a schedule that nobody controls and everybody can see coming. A commander who stays too long is not delayed — he is there until the following summer, with four thousand men and a fuel state.
"There is no bravery available in that decision," the master said. "You leave. Everybody leaves. It is the least interesting thing a commander ever does."
What it actually achieved
About 1.5 million square miles mapped from the air.
That is the reason the operation is in the history books and it is the part that gets left out of every retelling, presumably because aerial photogrammetry does not make a paragraph anybody wants to read.
The diary
There is a document, attributed to Byrd, describing something else entirely.
It surfaces decades after the fact. It is not in his papers — we wrote to the archive that holds them and their staff searched the catalogue. No chain of custody has ever been offered for it by anybody.
This newspaper's rule is that we do not cite a document whose route to us cannot be described in a sentence. Nobody has ever offered a sentence.
If somebody produces one, we will print it, and we will print it at the top of the piece rather than at the bottom.
The line our standards editor added
Three men died on that operation.
Our headline treats an early return as a small puzzle to be solved, and their families did not find it puzzling. That note is in the comparison box below at the standards editor's insistence and it is the right note.
They were named in the after-action report. They are named again in ours.
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Sources & Method
Read the after-action reports. That is the whole method, and it took three days, and as far as the reference staff could tell nobody had done it end to end before.
Who we spoke to
- Task Force 68 after-action reporting, Public record, National Archives. Read in the original over three days June 2026 Public since the 1940s. Nobody we spoke to had read it end to end.
- Dr. Ingeborg Salvesen-Mbeki, Polar historian. Interviewed by video call twice June 2026 Explains what besetment means for a task force and why a season ends when it ends.
- A retired icebreaker master, Named in our notes. Telephone July 2026 Describes the decision a commander faces when the pack closes. It is not a close call.
- The Byrd papers, University archive. Written enquiry; catalogue searched by staff June 2026 The 'secret diary' is not among them and never has been.
Documents
- PX-2047 — Task Force 68 after-action reporting, Operation Highjump, 1946–47 accepted
What we could not confirm
- Nothing about the operation. It is one of the best-documented expeditions of the century and the documents are public.
- The provenance of the 'secret diary'. It surfaces decades later, is not in his papers, and no chain of custody has ever been offered. We would print one if anybody produced it.
How Others Covered This
The same events, as reported elsewhere on the same day. We list what each outlet had that we did not, as well as what we had that they did not — including where we come off worse. Why we print this.
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The Hollow PostTHEY WENT TO FIGHT SOMETHING AND LOST
Reported the early withdrawal as a defeat and the deaths as combat losses.
Had that we did not
Nothing.
Left out
The after-action reports, which are public, and which name the aircraft, the weather and the three men.
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They Buriedthis newspaperThirteen Ships Went South. They Came Home Six Weeks Early.
Read the operational records rather than the legend.
Had that we did not
The besetment and fuel figures, which nobody had put in one place.
Left out
Three men died on that operation and our headline treats the early return as a puzzle. Their families did not find it puzzling. — V. Ashcombe-Doyle, standards editor
How was this story?
We publish the result, whatever it is. Reader verdicts appear on the front page and in our newsroom metrics.
Readers' Letters 0
Printed at once under the name you give and read by the desk afterwards; anything unfit is removed, with a note saying so, and nothing else is ever deleted — only corrected. Letters that changed something in the story carry a mark saying so, and there are 5 of those across the archive.