Katyn massacre

• 1. Introduction

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  The Katyn massacre names the place where Nazi German forces first uncovered mass graves in a Polish forest near Smolensk in 1943, but the killing had begun three years earlier, and the men who ordered it would spend the next five decades insisting someone else had done it. Nearly 22,000 Polish military officers, police officers, border guards, intelligentsia, and prisoners of war were executed by the NKVD, the Soviet secret police, on Joseph Stalin's orders between April and May 1940. The victims were shot in the back of the head. Their bodies were buried in forests that had already served as secret cemeteries for victims of the Great Purge of 1937-1938.

  Who were these 22,000 men, and why did Stalin want them dead? How did a crime of this scale stay hidden for fifty years? And why, even after the Soviet Union officially admitted responsibility in 1990, did legal reckoning remain beyond reach? Those questions trace through one of the most consequential cover-ups in twentieth-century history.

• 2. Who Were the Victims

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  Poland's conscription law required every nonexempt university graduate to become a military reserve officer. That single legal requirement handed the NKVD the Polish educated class. When the Soviet Union invaded Poland on the 17th of September 1939, under the terms of the Molotov-Ribbentrop Pact, it swept up somewhere between 250,000 and 454,700 Polish soldiers and policemen. Most were eventually freed or transferred, but roughly 125,000 ended up in NKVD-run camps.

  Of those, the three largest camps became holding sites for the men who would be killed. Kozelsk, housed in the Optina Monastery, held about 5,000 mainly military officers. Starobelsk held around 4,000. Ostashkov, on Stolobny Island on Lake Seliger, held about 6,570 gendarmes, police officers, prison officers, and members of the Polish Scouting movement. Together they totalled 15,570 men.

  The people killed at Katyn represented the multiethnic reality of interwar Poland. Ethnic Poles were joined by Ukrainians, Belarusians, and 700-900 Polish Jews. Among the dead were two generals, 24 colonels, 79 lieutenant colonels, 200 pilots, 20 university professors, 300 physicians, more than 100 writers and journalists, 43 government officials, and seven chaplains. In all, the NKVD executed almost half the Polish officer corps. One victim, Lieutenant Janina Lewandowska, daughter of General Jozef Dowbor-Musnicki, was the only woman prisoner of war killed at Katyn. Of the many thousands taken, only 395 prisoners were spared.

• 3. The Order and the Killing

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  On the 5th of March 1940, Lavrentiy Beria sent Stalin a note proposing the executions. Six members of the Soviet Politburo signed the resulting order: Stalin, Vyacheslav Molotov, Lazar Kaganovich, Kliment Voroshilov, Anastas Mikoyan, and Mikhail Kalinin. The order called for the execution of 25,700 Polish "nationalists and counterrevolutionaries" held in camps and prisons across occupied western Ukraine and Belarus. The historian Gerhard Weinberg later concluded Stalin's purpose was to deprive any future Polish military force of a large portion of its leadership.

  The men had arrived in camp expecting release. From October 1939 to February 1940, NKVD officers including Vasily Zarubin subjected them to lengthy interrogations. Any prisoner who could not be induced to adopt a pro-Soviet attitude was classified as a "hardened and uncompromising enemy of Soviet authority." That classification sealed their fate.

  The first transport to the Kalinin NKVD prison arrived on the 4th of April 1940, carrying 390 people. According to Dmitry Tokarev, former head of the Kalinin NKVD, the shooting started in the evening and ended at dawn, with the executioners struggling to process so many in a single night. Subsequent transports held no more than 250 people. The condemned were handcuffed, led into a cell insulated with sandbags and a heavy felt-lined door, and told to kneel. An executioner approached from behind and shot each man in the back of the head or neck. The body was removed through a second door and loaded into one of five or six waiting trucks while the next prisoner was brought in. Loud machines ran throughout the night to mask the sound of the pistol shots.

  The executions were carried out primarily with German-made .25 ACP Walther Model 2 pistols supplied from Moscow. Soviet Nagant M1895 revolvers were also used, but the NKVD preferred the German weapons because the Nagant's recoil made shooting painful after the first dozen kills. Vasily Mikhailovich Blokhin, chief executioner for the NKVD, is reported to have personally shot 7,000 of the condemned from the Ostashkov camp at Kalinin prison over 28 days in April 1940.

• 4. Discovery and the Propaganda War

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  Rudolf Christoph Freiherr von Gersdorff, a German officer serving as intelligence liaison for Army Group Centre, received reports about mass graves in the forest of Goat Hill near Katyn sometime in late 1942 or early 1943. Joseph Goebbels saw the discovery immediately as a propaganda weapon. On the 13th of April 1943, Reichssender Berlin announced to the world that German forces had uncovered a ditch 28 metres long and 16 metres wide containing the bodies of 3,000 Polish officers stacked in 12 layers.

  Goebbels wrote in his diary on the 14th of April 1943 that the discovery gave Germany excellent material for anti-Soviet propaganda and that the Nazi regime would "be able to live on it for a couple of weeks." He arranged for neutral journalists, Polish intellectuals, and a European forensic commission to inspect the graves. That commission, the Katyn Commission, included twelve forensic experts from a dozen countries including Belgium, Bulgaria, Croatia, Denmark, Finland, Switzerland, and occupied France. Two members, the Bulgarian Marko Markov and a Czech colleague, were later forced to recant their findings after their countries became Soviet satellite states.

  The Polish government-in-exile asked the International Red Cross to investigate. Stalin used that request as proof of a Polish-German conspiracy and severed diplomatic relations with the London-based Polish government. On the 24th of April 1943, Churchill assured Stalin that Britain would oppose any Red Cross investigation. Privately, Churchill told his foreign secretary that the matter should never be spoken of publicly, and his official inquirer, Owen O'Malley, noted several inconsistencies that made the Soviet version nearly impossible to sustain.

  When Goebbels learned in September 1943 that German forces would have to withdraw from the Katyn area, he wrote in his diary on the 29th of September that the Soviets would soon claim German forces had committed the shootings, and predicted the episode would cause Germany "quite a little trouble in the future."

• 5. The Cover-Up Machine

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  Having retaken the Katyn area in September-October 1943, NKVD forces destroyed the cemetery that German forces had permitted the Polish Red Cross to build and began planting false evidence. Because none of the documents found on the dead bore dates later than April 1940, investigators had to fabricate a timeline placing the killings in mid-1941, when Germany controlled the area. Witnesses were interviewed and threatened with arrest for Nazi collaboration if their accounts deviated from the official line.

  NKVD operatives Vsevolod Merkulov and Sergei Kruglov issued a preliminary report dated 10-the 11th of January 1944 concluding the Poles were shot by German soldiers. The Soviets then convened the Burdenko Commission, headed by Nikolai Burdenko, president of the USSR Academy of Medical Sciences, with members including the writer Aleksey Nikolayevich Tolstoy. No foreign personnel were allowed to participate. The commission exhumed the bodies, rejected the 1943 German forensic findings, and concluded all shootings were done by German occupation forces in late 1941. Historians Anna Cienciala and Wojciech Materski later noted the commission had no choice but to reach that conclusion. Burdenko reportedly acknowledged the cover-up to friends and family before his death in 1946.

  In January 1944, the Soviets invited more than a dozen mostly American and British journalists, along with Kathleen Harriman, daughter of the American ambassador, and John F. Melby, third secretary at the American embassy in Moscow, to visit Katyn. Melby's own report noted problematic witnesses, discouragement of questioning, and testimony that appeared memorized. He nonetheless felt the Soviet case was convincing at the time. Both Harriman and Melby were later asked to explain why their conclusions seemed to contradict their own observations, with suspicion that the State Department had shaped their official findings.

  In the United States, Roosevelt assigned Navy Lieutenant Commander George Earle to investigate and Earle concluded the massacre was Soviet. After consulting with Elmer Davis, director of the Office of War Information, Roosevelt officially rejected Earle's conclusion, declared he was convinced of Nazi guilt, and ordered the report suppressed. When Earle asked permission to publish, Roosevelt issued a written order to desist. Earle spent the rest of the war reassigned to American Samoa. A further report reaching the same conclusion was produced in 1945 and similarly stifled.

  In the 1950s, Alexander Shelepin, head of the KGB, proposed and carried out the destruction of many documents related to the massacre. His note to Nikita Khrushchev dated the 3rd of March 1959 recorded the execution of 21,857 Poles and recommended destroying their personal files to reduce the chance the truth would emerge.

• 6. Buried Truth in Poland

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  In post-war Poland, the pro-Soviet government suppressed all mention of Katyn in line with Moscow's official line. The massacre was specifically listed in the "Black Book of Censorship" used by authorities to control media and academia. Even mentioning the atrocity carried real risk. In the late 1970s, groups like the Workers' Defence Committee and the Flying University openly discussed the massacre despite arrests, beatings, detentions, and social ostracism.

  In 1981, the Polish trade union Solidarity erected a memorial bearing the simple inscription "Katyn, 1940." Police confiscated it and replaced it with an official monument reading "To the Polish soldiers - victims of Hitlerite fascism - reposing in the soil of Katyn." Each year on Zaduszki, the Polish day of the dead, memorial crosses appeared at Powazki Cemetery and at numerous other sites across the country, only to be dismantled by police. Katyn remained a political taboo in the Polish People's Republic until the fall of the Eastern Bloc in 1989.

  The legal attempt to hold individuals responsible ultimately ran into a wall. In 1991, Soviet prosecutors opened proceedings against Pyotr Soprunenko, the former head of NKVD's Prisoners of War and Internees Affairs department, for his role in the killings. Soprunenko was 83 by then, nearly blind, and recovering from cancer surgery. He denied his own signature during his the 29th of April 1991 interrogation and claimed he had been away in Vyborg when the prisoners disappeared. Prosecutors declined to proceed. Soprunenko died the following year.

• 7. Admission and Its Limits

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  On the 30th of October 1989, Mikhail Gorbachev allowed a delegation of several hundred Poles, organized by the association Families of Katyn Victims, to visit the memorial. Former U.S. national security advisor Zbigniew Brzezinski was among them. A mass was held, and one mourner covered the word "Nazis" on the memorial inscription with a sign reading "NKVD," so that it read "In memory of Polish officers killed by the NKVD in 1941." Brzezinski spoke about the need for truth as the foundation of genuine friendship between Soviet and Polish peoples. His remarks received extensive coverage on Soviet television.

  On the 13th of April 1990, the forty-seventh anniversary of the German announcement of the graves' discovery, the USSR formally expressed "profound regret" and admitted Soviet secret police responsibility. The day was declared a worldwide Katyn Memorial Day. Boris Yeltsin later released documents from the sealed "Package No.1" and transferred them to Polish president Lech Walesa, including Beria's original proposal dated the 5th of March 1940 bearing Stalin's signature, and Shelepin's 1959 note to Khrushchev recommending destruction of the victims' personal files.

  The Russian investigation that followed, spanning 1990-2004, confirmed Soviet responsibility but refused to classify the killings as a war crime or act of mass murder. Of 183 volumes assembled during the investigation, 116 were classified as state secrets. The Russian government declined to classify the dead as victims of the Great Purge, which meant formal posthumous rehabilitation was ruled inapplicable. When the case was brought before the European Court of Human Rights in a 2012 ruling, the court found Russia had violated the rights of victims' relatives by withholding information, but declined to rule on the investigation's effectiveness because the relevant events predated Russia's ratification of the Human Rights Convention in 1998.

  In November 2010, the Russian State Duma passed a resolution condemning Stalin and other Soviet officials by name for ordering the massacre. Members of the Communist Party voted against it. Thirty-five of the 183 investigation files remain classified in Russia to this day.

• 8. The Memorial and Its Fate

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  On the 10th of April 2010, an aircraft carrying Polish president Lech Kaczynski, his wife, and 87 other politicians and senior military officers crashed near Smolensk. All 96 aboard were killed. The passengers had been travelling to attend a ceremony marking the 70th anniversary of the massacre. Prime Minister Donald Tusk, who was not on the plane, called it "the most tragic Polish event since the war." The crash prompted a rebroadcast of the 2007 film Katyn on Russian television.

  In 2021, the Russian Ministry of Culture downgraded the memorial complex at Katyn on its Register of Sites of Cultural Heritage from federal to regional importance. The following year, after Poland began removing Soviet-era monuments, pro-government Russian activists parked heavy machinery bearing Russian Federation flags and the letter Z outside the Katyn Memorial Cemetery, an act widely interpreted as intimidation. In June 2022, Russia removed the Polish flag from the memorial complex. In April 2023, Russian authorities ordered all Polish flags removed from the site before the annual commemoration on the 20th of April.

  Also in April 2023, Russian state media RIA Novosti reported that the FSB had handed over archival documents to the Central State Archive of St. Petersburg, including testimony from a German soldier claiming to have participated in Katyn burials in early September 1941. The documents were cited as evidence that the executions were carried out by the Nazis. At Mednoye in the Tver Region, a site that was never under German occupation, investigators in the 1990s found well-preserved Polish uniforms, documents, and Soviet newspapers dating back to 1940 alongside the remains of victims from the same camps as those killed at Katyn.