Percy Robinson still had stitches in his face when they marched him toward the docks.
He had spent about a week in the hospital after the Port Chicago explosion. His face and arms had been injured badly enough that, by his own later recollection, he was still bandaged when he rejoined his unit. Not long afterward the men were formed outside their barracks at Mare Island and told to march. They had not yet been told what work they were being sent to do.
Joe Small was on the outside of the formation calling cadence. Then an officer gave the order: “Column left.”
The line stopped.
Small remembered the reason fifty years later. A left turn took them toward the docks. The docks meant loading ammunition. Three weeks earlier, hundreds of men doing exactly that job had disappeared in an explosion so violent that only a fraction of the bodies could be individually identified.
The refusal later became an important civil-rights episode, but the immediate situation was also narrower and more dangerous: wartime sailors were being ordered back to ammunition loading three weeks after an explosion had killed 320 people, while the cause and safety failures were still under investigation.
Before the left turn
Port Chicago had been built on Suisun Bay after Pearl Harbor, when the Navy realized the existing ammunition facilities at Mare Island would not be able to handle the volume required by a Pacific war. Railcars brought bombs, shells, powder and other ordnance to the new magazine. From there the material moved onto ships bound west.
The labor system was segregated. African American enlisted sailors made up the ordnance battalions doing much of the heavy loading work. Their supervising officers were white. The arrangement reflected a Navy that still restricted Black sailors from most seagoing specialties and concentrated them in service and labor assignments.
The training question is messier than some modern summaries make it sound.
Later National Park Service and Navy histories emphasize the inadequacy of specialized ammunition-handling preparation and the gap between what these sailors were being asked to do and the training expected of experienced civilian stevedores. The Navy’s own 1944 Court of Inquiry, however, said that some divisions had received instruction with experienced ordnancemen at Mare Island and claimed that vigorous efforts had been made to train them. The same inquiry also acknowledged that Port Chicago had begun operations without enough trained officers and crews for their specialized duties and suffered from a serious shortage of qualified petty officers.
The inquiry itself is a difficult document. It contains valuable technical evidence while also describing the Black enlisted personnel in language that the Navy’s modern historical review recognizes as reflecting racist stereotypes. It praised the white officers’ leadership while treating the supposed deficiencies of the enlisted men as a recurring explanation for operational trouble.
The men remembered the workplace differently. Survivors later described constant pressure to increase tonnage. Joe Small and Percy Robinson recalled officers wagering over which division could load more ammunition during a shift. The contemporary Court of Inquiry specifically concluded that posting divisional tonnage figures had not increased the hazards of loading. Those are not identical claims, but they belong beside one another because they show how differently the same workplace was understood from the pier and from the investigating board.
10:19
On the night of July 17, two cargo ships were alongside the munitions pier: E. A. Bryan and the newly arrived Quinault Victory.
The Court of Inquiry calculated that Bryan held 4,606 tons of munitions. Another 429 tons sat in sixteen railcars on the pier awaiting loading. Bombs, antiaircraft ammunition, smokeless powder and high explosives were concentrated within a very small working area.
At roughly 10:18 or 10:19 p.m., witnesses heard a metallic sound and splintering wood, followed by a flash and an explosion on or near the pier. Seconds later came the much larger detonation.
The blast destroyed E. A. Bryan and most of the pier, tore Quinault Victory apart, collapsed nearby railcars, and sank a Coast Guard fire barge with its five-man crew. Buildings and equipment across the waterfront were wrecked.
Three hundred twenty people were killed. Two hundred two of them were African American sailors assigned to the loading operation. Nearly four hundred other people were injured. The Navy later recorded that only fifty-one of the dead could be identified from intact remains.
The explosion had another peculiarity. Nobody could say with certainty what caused it.
The thing the Navy did not know
Investigators considered several possibilities. Witness testimony suggested some kind of accident on the pier immediately before the first detonation, but the explosion destroyed almost everything that might have settled the question. The official inquiry never identified a definitive initiating cause.
That uncertainty matters because of what happened next. The surviving Black sailors did not watch the Navy determine precisely what had gone wrong, correct it, retrain everyone and then refuse to work anyway. The investigation was still going on.
The men were transferred to Mare Island. White officers who survived Port Chicago received hardship leave; the surviving African American ammunition handlers were eventually directed back toward ammunition-loading duty. The Navy’s own 2024 review specifically noted that they were expected to resume the work while questions about the explosion and safety practices remained unresolved.
Percy Robinson remembered being sent back while his injuries were still visible. Then came the march.
Column left
The oral-history recording is useful because nothing in the scene feels prepared for history. Robinson remembered the formation moving forward before the men understood exactly where they were going. Small remembered calling cadence.
Then came the order to turn left. Everyone stopped.
The refusal did not remain that simple for long. The Navy demanded an answer from the men individually: would they load ammunition?
Albert Williams later remembered answering that he was afraid to do it. Other men stepped aside as they were questioned. Eventually 258 African American sailors refused the loading assignment.
Senior officers warned them that continued refusal could be treated as mutiny, a profoundly serious charge in wartime. Two hundred eight eventually agreed to return. The Navy nevertheless convicted those men through summary courts-martial for disobeying orders and took three months of pay.
Fifty held out. Those fifty were charged with mutiny.
Fifty men
The trial opened at Treasure Island on September 14, 1944.
The government’s theory was not simply that each man had separately refused an order. Prosecutors alleged conspiracy to commit mutiny, which transformed a workplace refusal into something much more serious under military law.
Gerald Veltmann served as the principal defense attorney. Thurgood Marshall, then working for the NAACP, attended the proceedings, assisted the defense effort and made the racial circumstances of the case a public issue. He did not, as it is sometimes casually stated, personally act as trial counsel for the fifty defendants.
On October 24, all fifty were found guilty. The National Park Service’s synopsis says the board deliberated for eight minutes. Sentences ranged from eight to fifteen years of hard labor, accompanied by dishonorable discharges.
The report came afterward
The Court of Inquiry finished its work on October 30. Its report could not identify the exact cause of the blast, but it did produce nineteen substantive recommendations touching ammunition handling, facilities, equipment and explosive hazards.
The fifty men had already been convicted.
That is not a piece of hindsight invented by later critics. It became one of the reasons the Navy itself gave eighty years later for undoing the convictions.
When the Department of the Navy reopened the cases, its legal review concluded that the courts-martial had contained significant errors. The men had been tried together despite conflicting individual interests. They had been denied a meaningful right to counsel. And the trials had occurred before the Court of Inquiry completed the report that might have provided important evidence concerning the safety concerns underlying the refusal.
The part that changed faster
The fifty men were not exonerated after the war. Their confinement ended in January 1946 after clemency and sentence reductions, and they returned to naval duty before eventually leaving the service. Efforts to clear their records continued for decades. Freddie Meeks, one of the fifty, received a presidential pardon in 1999. That pardon applied to him alone.
The Navy itself changed more quickly than the verdicts did.
Port Chicago did not single-handedly desegregate the armed forces, and it would be bad history to pretend it did. The disaster and trial did, however, expose the operational and moral cost of segregated naval policy at a moment when the Navy was already under pressure to reconsider it. Naval History and Heritage Command credits the episode with accelerating changes in the assignment and integration of Black sailors and with contributing to major revisions in ammunition-handling procedures and training.
There is a useful comparison here with Final Vestige’s The Hoses That Wouldn’t Fit. Baltimore’s fire exposed an interoperability problem that institutions had recognized without solving. Port Chicago is different in almost every technical respect, but the institutional rhythm is familiar: people had noticed vulnerabilities before catastrophe made them expensive enough to force change.
The fifty convictions remained.
Eighty years
On July 17, 2024, exactly eighty years after the explosion, Secretary of the Navy Carlos Del Toro announced that the remaining convictions arising from the Port Chicago refusal would be set aside.
The action covered the Port Chicago 50 and the remaining defendants from the related summary courts-martial, 256 men in all whose cases had not otherwise been resolved. The Navy did not frame the action as forgiveness for misconduct. Its legal review concluded that errors in the original proceedings meant the outcomes were unjust.
That distinction matters. A pardon forgives a conviction. The Navy’s 2024 action set these convictions aside because, after reviewing the proceedings, it concluded they should not stand.
None of the Port Chicago 50 lived to see the collective action. The records changed after the men were gone.
The left turn
There are several enormous numbers in the Port Chicago story: more than five thousand tons of munitions concentrated on a ship and pier, 320 dead, fifty men placed on trial together, eight decades before the remaining convictions were set aside.
The detail I have the easiest time picturing is smaller.
Percy Robinson has come back from the hospital with stitches still in. The sailors are marching. Joe Small is calling cadence.
An officer tells them to turn left.
And the line stops.
Sources & Further Reading
The strongest records for this story are the Navy’s own 1944 inquiry, later Navy historical reviews, the surviving sailors’ oral histories, and the Department of the Navy’s 2024 legal action.
- U.S. Navy Court of Inquiry, Finding of Facts: General Findings (1944). The contemporary investigation’s findings on munitions quantities, organization, losses and the circumstances surrounding the explosion.
- Naval History and Heritage Command, “Port Chicago Naval Magazine Explosion”. A modern Navy synthesis especially useful for the physical sequence of the blast, the inquiry’s limits and the racial structure of the command.
- Regina T. Akers, Naval History and Heritage Command, “Port Chicago Disaster: Leadership Lessons Learned”. A detailed institutional review of training, command responsibility, segregation, operational pressure and later reforms.
- National Park Service, “The Port Chicago 50: An Oral History” materials. Recorded recollections from survivors including Percy Robinson, Joe Small, Albert Williams and Freddie Meeks; the source for the Mare Island march and “column left” episode.
- National Park Service, “The Mutiny Trial”. Trial chronology, courtroom documentation, Gerald Veltmann’s defense role, Thurgood Marshall’s involvement and archival imagery.
- Department of the Navy, “The Secretary of the Navy Exonerates 256 Defendants…” (July 17, 2024). The authoritative statement setting aside the remaining Port Chicago convictions and identifying the legal errors found in the original courts-martial.