John N. McMahon and the Soviet Ledger of Polish Ammunition
By Constance Bell ·
Kept secret for 37 years, a Russian-language inventory of Polish munitions reveals exactly how the Soviets managed their satellite's war chest while the West watched the border.
The soldiers of the Polish Army lived as tenants in their own barracks, their ammunition tallied in a language they did not speak and stored for a master who did not trust them. When the Soviet Union decided where a war would be fought, the men in Poland were merely the materiel to be expended.
On 6 October 1980, John N. McMahon, the CIA's Deputy Director for Operations who would eventually become the agency's 15th deputy director, sent a memorandum to the Director of Central Intelligence. It was a translation of a Russian-language report, a record the Soviets had marked "SECRET OF SPECIAL IMPORTANCE." The text was not a diplomatic cable or a political summary; it was a ledger of violence. It detailed the "Availability and Location of Materiel Reserves for Support of the Polish Army and Navy Assigned to the Composition of the Combined Armed Forces in Wartime," as of 1 January 1980.
The Nurzec Tonnage
The record lists the holdings of the Polish Army and Navy—military formations raised to fight the Axis in World War II but later integrated into the security architecture of the Warsaw Pact, the collective defense treaty signed in 1955 that bound the Eastern Bloc socialist republics to the Soviet Union. The inventory is exhaustive, stripping the sovereign facade from Poland, a country in Central Europe bordering Germany to the west, and exposing it as a giant warehouse for Soviet strategic needs.
At the 22d Weapons and Ammunition Depot at Nurzec, the tonnage was staggering. The record shows a total of "19830" tons of reserves. This included 3,755 tons of small arms ammunition, 4,775 tons of mortar and artillery shells, 8,629 tons of tank rounds, and 2,400 tons of antiaircraft ammunition. Other sites were similarly laden: the 3d Weapons and Ammunition Depot at Szeroki Bor held "13317" tons, including 5,504 tons of tank ammunition.
In the coastal regions, the ledger turns to the sea. The Military Port Depot at Swinoujscie is listed as holding 557.5 tons of mines and 185.0 tons of rounds. At the 24th Naval Depot in Darlowo, the record counts 146.0 tons of mines and 224.0 tons of mine guards. These were not stores for a national defense force protecting a coastline; they were the components of a blockade and an invasion force, tallied by Moscow to ensure the machinery of the Warsaw Pact could grind forward toward the Atlantic.
The 30-Minute Window
McMahon did not keep this information confined to the halls of the CIA. The distribution list reads like a strike package. He sent the report to the Director of the Defense Intelligence Agency—the combat support agency of the Defense Department specializing in military intelligence—as well as the intelligence chiefs of the Army, Navy, and Air Force.
This distribution proves the document's utility. The record does not merely list how many shells were in a hole; it lists how quickly they could be moved. Every depot entry contains a column for "Loading time (in minutes)" and the "Number of vehicles" available for distribution. At the 20th Regional Typical Base, the record lists "60" vehicles and a loading time of "30" minutes. At the 15th Regional Technical Depot in Krzyszkowice, it is similarly "20" vehicles and "20" minutes.
The record further distinguishes between "guarded dumps," "unguarded" sites, and "underground dumps." At the 3d Central Explosives Depot in Krapkowice, the Soviets had cached 4,379 tons of mines in guarded dumps and 41 tons in unguarded ones.
The desk's reading is that this was never intended as a strategic assessment of Polish capabilities. It was a tactical target list. For a war-plans analyst, the difference between a guarded underground dump and an unguarded tent is the difference between a coordinated strike and a sabotage mission. By recording the loading times and vehicle counts, the Soviets were calculating the tempo of their own mobilization. By passing this to the U.S. military services, McMahon was handing them the coordinates for a campaign of interdiction.
A Master’s Ledger
There is a profound irony in the language of the record. While the Polish Army and Navy were nominally the forces of the Polish state, the intelligence was provided to the CIA as a translation of a Russian-language document. The Soviets were not reporting on an ally; they were auditing a subsidiary.
This intelligence was provided by the CIA's Directorate of Operations, the division tasked with the clandestine collection of intelligence and the execution of covert actions. McMahon warns that the product came from "certain extremely sensitive agent sources" and that the "codeword" assigned to the material is classified.
If the shape of this file is what it appears to be, the source was not a Polish official. A Polish officer might know what is in his own depot, but he would not have access to a consolidated, Russian-language report classified "SECRET OF SPECIAL IMPORTANCE" by the Soviet high command. The pattern suggests the source was positioned within the GRU—Soviet military intelligence—or the Warsaw Pact high command itself. The Americans were reading the Soviet Union's own internal audit of the Polish war chest.
The Missing Analysis
The memorandum is dated 6 October 1980. This date is critical. In the summer of 1980, the Solidarity movement had begun to tear at the fabric of the communist state in Poland. The world was watching to see if the Soviet Union would intervene militarily to crush the uprising, repeating the bloody lessons of Hungary in 1956 and Czechoslovakia in 1968.
Yet, this memorandum contains no analysis. There is no "so what." McMahon provides the documentary summary and the translation, but he offers no conclusion on whether these 19,830 tons of ammunition at Nurzec were being positioned for a domestic crackdown or a foreign offensive.
The desk's reading is that the analytical core of this intelligence—the actual assessment of the likelihood of a Soviet invasion of Poland—was withheld in a separate, more sensitive document. This memorandum was merely the raw data, the evidence used to support a conclusion that was too volatile to be attached to a distributive report.
Furthermore, the obsession with the "codeword" and the "extremely sensitive" nature of the source indicates that the CIA was protecting more than just a name. The withheld pages likely hide the identity of a mole who had compromised the Soviet Union's internal monitoring of its satellite states. To reveal the source would be to tell Moscow exactly how the Americans were seeing through the curtain.
The pattern established by this ledger is one of total ownership. The Soviet Union viewed Polish military reserves as Soviet assets managed on Polish soil. The tonnage, the loading times, and the guard status were recorded in Moscow because the Polish forces were not partners in an alliance; they were a reserve force for the Soviet empire. The American intelligence apparatus knew this, tracked it down to the ton, and filed it away as a record of the enemy's logistics.
What the still-withheld pages would show is the degree to which the Soviets were paralyzed by their own leaks. The desk's reading is that the CIA's penetration of the Warsaw Pact's high command was so deep that the Soviets could not even trust their own inventories of "SECRET OF SPECIAL IMPORTANCE." The cost of this compromise was paid in the anxiety of the Kremlin, but the benefit was bought by the West, which could watch the Soviet war machine's every movement through the eyes of its own officers.
Sources
- <SANITIZED> REPORT- RESERVE SUPPLIES FOR POLISH FORCES ASSIGNED TO THE WARSAW PACT IN WARTIME — CIA FOIA Electronic Reading Room
- CIA Analysis of the Soviet Navy collection — CIA FOIA Reading Room
- Document PDF (<SANITIZED> REPORT- RESERVE SUPPLIES FOR POLISH FORCES ASSIGNED TO THE WARSAW PACT IN WARTIME)
- Background: World War II — Wikipedia