Zossen documents

Begun as early as 1933, the archive had its origins in Dohnanyi's—who was serving as the Personal Assistant to the Reich Minister of Justice—documentation of Nazi criminality. Using his privileged access to the full range of regime crimes, Dohnanyi began assembling a record intended to facilitate an eventual judicial reckoning.^[4] Working within the Abwehr's coordinating section under Oster, Dohnanyi accumulated material from multiple sources within the conspiratorial network—including documentation gathered by Hans Bernd Gisevius—and stored it alongside Oster's own operational planning study for the coup, which listed leading regime figures to be arrested and subsequently named the units to be deployed for carrying out the captures.^[5] The Abwehr's organizational structure provided indispensable cover as "intelligence material" for incriminatory content that would have been unmistakably treasonous in any other context; the content was camouflaged as ostensibly misleading information prepared for transmission to Germany's enemies—a designation that would later frustrate Gestapo attempts to weaponize the archive's contents against its compilers in court.^[6]

The collection's most sensitive single item was the so-called 'X Report', which had been drafted by Dohnanyi; it summarized Dr Josef Müller's Vatican soundings in the winter of 1939–40, during which the British government indicated its willingness to negotiate with a successor non-Nazi German government.^[7] Finalized in early 1940 and delivered in April to Franz Halder and Walther von Brauchitsch in a concerted effort to impel the Army High Command to act, the X Report apparently survived in a Zossen safe until its discovery by the Gestapo on 22 September 1944, after which it disappeared and was almost certainly destroyed.^[7] Also among the holdings were the personal diary of Admiral Canaris—meticulous records kept with the explicit intention of supporting a postwar German legal proceeding against Nazi officials—the so-called Fritsch papers, documentation relating to the manufactured case against Werner von Fritsch in 1938, and the Vatican papers arising from Müller's Rome negotiations.^[8] Dohnanyi had also compiled what his wife Christine later described as a running 'chronicle' of Nazi crimes assembled from 1933 onward.^[1]

Dohnanyi's possession of incriminating material for members of the regime first came to Gestapo attention on 5 April 1943, when Judge Advocate Dr Manfred Roeder appeared at Canaris's office to initiate an investigation into the illegal transfer of foreign currency to Jews operating as nominal Abwehr agents abroad. During the subsequent search of Dohnanyi's safe, Dohnanyi attempted to signal to Oster that certain papers should be treated as official "intelligence material," which Oster misunderstood and instead attempted to pocket them.^[9] Oster's actions were observed by the Gestapo official Franz Sonderegger, and the resultant suspicion this elicited spread far beyond the original currency charges. Dohnanyi, Bonhoeffer, Dr Josef Müller, and Bonhoeffer's sister Frau von Dohnanyi were arrested the same day; Oster was placed in custody and released from active service in March 1944.^[9] The papers had, however, remained in the Zossen safe and the Gestapo's suspicions, though aroused, were only gradually allayed, and it took months of messages smuggled from prison before Dohnanyi could persuade Oster to treat the compromising papers as official "intelligence material."^[10]

In the weeks following the failure of the 20 July plot, the Gestapo labored to reconstruct the conspiracy's personnel and organizational structure from fragmentary evidence.^[6] Lieutenant-Colonel Werner Schrader, one of those responsible for the archive under Abwehr control, was implicated in the plot; some of the papers were allegedly buried, but Schrader committed suicide on 28 July 1944 in his quarters in Zossen before any attempt at concealment could be completed, leaving a note reading: 'I will not go to prison; I will not let them torture me.'^[11][2] The Gestapo opened the safe on 22 September 1944, yielding what Hoffmann describes as "an important haul of documents" assembled by Dohnanyi, Oster, and Bonhoeffer—including details of the 1938 conspiracy preparations—though the material proved of limited utility as legal evidence.^[6] The most compromising documents had been so thoroughly camouflaged as "intelligence material" that, in matters of espionage involving double agents, it was in practice impossible to distinguish actual treason from ostensible treason intended to deceive the enemy, and no such material could be used as court evidence.^[6]

Under the personal supervision of SD chief Ernst Kaltenbrunner, the documents were subsequently transported to Schloss Mittersill in the Tyrol and burned.^[8] This destruction was later confirmed by Huppenkothen, the Gestapo official who conducted the final proceedings against Canaris and Oster at Flossenbürg, who testified before the Munich Court of Assize in February 1951 that the papers found in Zossen had been destroyed by the Gestapo.^[1]

The most operationally consequential document in the archive was not among those recovered in September 1944. Admiral Canaris's complete diary — maintained with conspicuous thoroughness as the intended evidentiary basis for postwar German proceedings against the Nazi leadership — remained undiscovered until April 1945. Its recovery enraged Hitler sufficiently that he ordered the execution of the entire Canaris group; in any case it had never been intended that this circle of ex-Abwehr officers would escape, and their formal trial before the People's Court had been deferred precisely because a detailed public airing of Abwehr operations would not have been expedient for the regime.^[12]

On 6 April SS-Standartenführer Walter Huppenkothen stopped at Sachsenhausen concentration camp, where Dohnanyi, who with his wife's covert assistance and had been confined to the police hospital for an infection, was subjected to a summary 'trial' while semi-conscious and on a stretcher; he was executed on 9 April.^[3] Huppenkothen proceeded to Flossenbürg, where a court martial was convened on Canaris, Oster, Dr Sack, Captains Strünck and Gehre, and Bonhoeffer; Canaris was severely beaten during the proceedings. On the morning of 9 April 1945—less than a month before Germany's unconditional surrender—all were hanged.^[3]

The Zossen archive represented the most systematic attempt within the German military resistance to create an evidentiary record capable of sustaining legal proceedings against the Nazi regime—a project rooted, from its inception, not merely in moral opposition but within a legal framework that the regime's crimes could be documented with the necessary rigor fitting a future tribunal. That the documents ultimately served the opposite function—as the proximate instrument of their compilers' destruction rather than of the regime's—is among the more consequential ironies of the resistance's fate. The burning of the archive at Mittersill means that the full contents of the Zossen safe remain unknown; what survives of the Zossen documents is largely reconstructed from the testimony of participants, Gestapo investigation reports, and the postwar statements of officials such as Huppenkothen and Sonderegger.^[1][8]