120,000 Interned and the Provost Marshal's Ledger
By Marcus Boone ·
Japanese-Americans and factory workers were fingerprinted and filed under "domestic disturbances" in a system that bypassed civilian law for four years.
A factory worker in 1942 did not have to commit a crime to be fingerprinted by the United States Army; he only had to hold a job at a defense plant. For 120,000 people of Japanese descent, the cost of this administrative efficiency was the loss of their homes and the sudden, forced transition to a fenced enclosure.
This record is a scope-and-content description of a series of unclassified decimal files, a map of the paperwork used to manage the American interior during the second World War. It catalogs the administrative machinery of the Provost Marshal General's sections, the Army office responsible for preparing regulations and field manuals for the War Department and the Department of the Army. The Provost Marshal General is the highest-ranking law enforcement officer in the Army, reporting directly to the chief of staff to consolidate all military police activity under one roof.
Domestic Disturbances
The files do not distinguish between a striking machinist and a citizen held in a camp. The record groups "domestic disturbances, especially labor disputes" with the "protection of defense installations," and identifies "war relocation centers used for the internment of Japanese-Americans" as project file subjects within that same operational framework.
These relocation centers were operated by the War Relocation Authority, the agency tasked with the forced removal and incarceration of over 100,000 people, mostly U.S. citizens, following Executive Order 9066. By grouping these centers with "domestic disturbances" and "labor disputes," the Army revealed its true view of the internment. The desk's reading is that the incarceration of Japanese-Americans was managed not as a judicial or intelligence-led operation based on actual threats, but as a logistical deployment exercise in crowd control. To the Provost Marshal General, the removal of an entire ethnic group was simply another project in maintaining order, no different from managing a picket line at a munitions plant.
File 370.93
The record tracks the "strength, training, and deployment of military police units," but it also tracks their failures. Specifically, file 370.93 contains "reported problems with military police personnel, including the lack of cooperation with civil authorities."
This friction suggests a systemic conflict between the Army's mandates and the laws of the states. The public record establishes that the Provost Marshal General’s office provided the legal and logistical scaffolding for the Army to act as a strike-breaking force for private defense contractors. When the Army was ordered to protect a defense installation, the military police did not view local sheriffs or city police as partners, but as obstacles to industrial production.
If the shape of this file is what it appears to be, the "lack of cooperation" was not a series of accidental personality clashes between colonels and mayors. It was a deliberate policy. The Army viewed the maintenance of the defense industrial base as a matter of national survival that overrode the jurisdiction of civilian law enforcement. The military police were not there to support civil authority; they were there to replace it whenever the civilian police proved too lenient with striking workers.
The Housekeeping of Captivity
When the files turn to the prisoners of war, the focus shifts to the mundane. The "PW Camps" project files—which include facilities like Camp Algona in Iowa, where German soldiers were held until 1946—are preoccupied with "the provision of adequate religious services (file 000.3), the control of financial matters (file 123), the processing of mail (file 311.7), and the transfer of POWs and internees (file 383.7)."
There is a jarring contrast between the high stakes of war and the banality of these entries. The files record who got their mail and who went to chapel, but they are silent on the specifics of interrogation or the intelligence harvested from the prisoners.
This suggests a bifurcated record. The pattern indicates that these decimal files represent the "housekeeping" layer of detention—the administrative surface designed for transparency or future audit. The actual intelligence, the interrogation reports, and the security screenings of both POWs and Japanese-American internees were mirrored in a parallel, classified architecture. The unclassified files tell us how the prisoners were fed and mailed; they do not tell us how they were broken or what the Army learned from them.
The Input Phase
The most revealing aspect of the Provost Marshal's ledger is the treatment of the American worker. The record notes the Army's role in "finger printing, assigning identification cards and assigning individual serial numbers to defense plant workers."
This was the creation of a domestic surveillance apparatus. By assigning serial numbers to civilians and taking their prints, the Army integrated the industrial workforce into its own tracking system. Yet, the record shows the collection of this data without any corresponding record of how that data was used to target or blacklist individuals.
This gap is telling. The files document the "input" phase—the collection of biometric data and the issuance of IDs—while the "output," consisting of the resulting target profiles and security clearances, was withheld from the decimal filing system. The Army built a database of its own citizens and then kept the results of that database in a different room.
The Desk's Reading
When one connects the fingerprinting of workers, the silencing of labor disputes, and the logistics of the relocation centers, a singular picture emerges. The Provost Marshal General's office was not merely managing military police; it was running a domestic stabilization program that viewed the U.S. population as a potential source of "disturbance."
Whether it was a Japanese-American family in California or a union organizer in a Midwest plant, the Army applied the same toolkit: identification, surveillance, and, if necessary, removal. The fact that the internment centers are filed under the same project heading as labor disputes proves that the Army viewed the loss of civil liberties not as a legal crisis, but as a deployment problem.
The pattern suggests that the Army established a permanent infrastructure for domestic intervention during the war, one that functioned by overriding civil authorities and treating citizens as administrative units. A full release of the classified mirrors to these files would almost certainly show that the "lack of cooperation with civil authorities" was the intended state of affairs. The Army didn't want to cooperate with the law; it wanted to be the law, and the people who paid for that ambition were the citizens who found themselves fingerprinted, numbered, and fenced in.