On July 20, 1944, Colonel Claus von Stauffenberg placed a briefcase containing two pounds of plastic explosive under a conference table at Hitler's East Prussia headquarters. The bomb detonated at 12:42 PM. Hitler survived with minor injuries. By midnight, Stauffenberg and three co-conspirators were executed by firing squad in Berlin. Over the following eight months, Roland Freisler's People's Court condemned more than 200 people to death. This is the documented history of Operation Valkyrie — what the conspirators planned, why it failed, and what they intended to build in place of the Third Reich.
At 12:37 PM on July 20, 1944, Colonel Claus von Stauffenberg placed a briefcase under a conference table at the Wolf's Lair, Hitler's military headquarters in East Prussia. The briefcase contained 975 grams of British plastic explosive with a ten-minute chemical fuse. Stauffenberg excused himself from the conference, left the building, and waited. At 12:42 PM, the bomb detonated.
The explosion killed four people instantly: a stenographer, Hitler's deputy Rudolf Schmundt, General Günther Korten, and Colonel Heinz Brandt, who had unknowingly moved the briefcase to the far side of the table's heavy oak support. Hitler survived with perforated eardrums, burns on his legs, and over 100 wooden splinters that had to be surgically removed. The conference table's thick oak top had deflected the blast upward and outward. If the meeting had been held in the usual concrete bunker instead of the wooden barracks — changed because of summer heat — Hitler almost certainly would have died.
Stauffenberg, believing Hitler was dead, flew back to Berlin to coordinate the coup. By 4:00 PM, General Friedrich Olbricht had issued Operation Valkyrie orders mobilizing the Reserve Army to "suppress" an alleged SS coup attempt. Within hours, Wehrmacht troops occupied government buildings in Berlin, Paris, and Vienna. In Paris, the military commander arrested 1,200 SS and Gestapo personnel.
But at the Wolf's Lair, Hitler was alive. By 6:30 PM, he had spoken on the telephone with Propaganda Minister Joseph Goebbels, who broadcast confirmation that the Führer had survived. The coup collapsed. By midnight, Stauffenberg and three co-conspirators were dead, executed by firing squad in the Bendlerblock courtyard.
The July 20 plot was not an isolated assassination attempt. It was the culmination of a resistance network that had been operating since 1938, when senior Wehrmacht officers first discussed removing Hitler to prevent what they saw as a catastrophic war. The conspiracy included:
The conspiracy's intellectual center was the Kreisau Circle, named after Helmuth James von Moltke's Silesian estate where the group met between 1940 and 1943. The Circle included aristocrats, socialists, Catholic and Protestant clergy, and civil servants. They drafted detailed plans for Germany's post-war reconstruction — not just the removal of Hitler, but the complete restructuring of German society along decentralized, democratic, and European-oriented lines.
Major General Henning von Tresckow organized at least three earlier assassination attempts. In March 1943, he placed British plastic explosive disguised as brandy bottles on Hitler's plane — the detonator failed in the cold cargo hold. In November 1943, an officer was prepared to detonate a suicide bomb during a Hitler speech — the event was cancelled. Tresckow recruited Stauffenberg in 1943, recognizing that Stauffenberg's new position as Chief of Staff to the Reserve Army gave him both access to Hitler and control over the troops needed to execute a coup.
The coup plan was ingeniously simple. The Wehrmacht had developed Operation Valkyrie as an emergency mobilization plan in case of internal unrest, slave labor uprising, or Allied airborne landing in Germany. The plan authorized the Reserve Army to occupy government buildings, secure communications centers, and arrest designated individuals.
General Friedrich Olbricht modified Valkyrie so that the same orders could be used to arrest SS and Nazi Party officials by claiming the SS had attempted a coup against Hitler. The plan exploited existing tensions between the Wehrmacht and the SS. Once Valkyrie was activated, Wehrmacht commanders would receive orders to arrest local SS and Gestapo leadership "to restore order."
The plan worked brilliantly — in Paris. Military Governor Carl-Heinrich von Stülpnagel arrested 1,200 SS and SD (security service) personnel within hours. In Vienna, Wehrmacht troops occupied key buildings. But in Berlin, the conspiracy ran into two fatal obstacles.
First, the coup required immediate, decisive action before confirmation of Hitler's death could be verified or denied. Stauffenberg arrived back in Berlin at 4:30 PM, but precious hours had already been lost. Second, the conspiracy depended on General Friedrich Fromm, commander of the Reserve Army, who had deliberately maintained ambiguity about his involvement. When Fromm received telephone confirmation from the Wolf's Lair that Hitler was alive, he refused to support the coup and tried to arrest the conspirators.
By 6:30 PM, when Hitler spoke to Goebbels by telephone, the coup was effectively over. Major Otto Ernst Remer, commander of the Berlin Guard Battalion initially ordered to arrest Goebbels, was connected by phone directly to Hitler and ordered to suppress the coup. Wehrmacht officers who had occupied the Propaganda Ministry withdrew. By 11:00 PM, loyalist officers stormed the Bendlerblock and arrested the conspirators.
General Fromm, desperate to prove his loyalty and eliminate witnesses to his own ambiguous role, convened an immediate "court-martial." At 12:10 AM on July 21, Stauffenberg, Olbricht, Stauffenberg's aide Werner von Haeften, and Albrecht Mertz von Quirnheim were taken to the courtyard and executed by firing squad under vehicle headlights. Beck was allowed to attempt suicide but only wounded himself; an officer finished the execution.
"Long live sacred Germany."
Claus von Stauffenberg — last words before execution, Bendlerblock courtyard, July 21, 1944, 12:10 AMFromm's summary executions enraged Hitler, who wanted the conspirators interrogated and publicly tried. Fromm was arrested and eventually executed himself in March 1945 — not for participating in the plot, but for "cowardice" in failing to prevent it and for destroying evidence by executing the ringleaders immediately.
What followed was one of the most extensive political purges in Nazi Germany's history. The Gestapo arrested over 7,000 people. More than 200 were executed after show trials before the People's Court presided over by Judge Roland Freisler.
Freisler's trials were designed for maximum humiliation. Defendants were denied lawyers, screamed at from the bench, and in some cases forced to appear without belts so their trousers would fall down. Many were hanged with piano wire from meat hooks in a slow strangulation that could take minutes. Hitler ordered the executions filmed so he could watch them.
The first trial began August 7, 1944. Field Marshal Erwin von Witzleben, designated to become Commander-in-Chief of the Wehrmacht, was forced to appear holding up his trousers. When Freisler mocked him for removing his false teeth (they had been confiscated), Witzleben shouted back. He was hanged the same day. The execution was filmed.
Carl Goerdeler, the former Mayor of Leipzig designated to serve as Chancellor, went into hiding after July 20. The Gestapo offered a one-million Reichsmark reward for information leading to his capture. He was arrested on August 12, 1944. Under interrogation and torture, his detailed memoranda on post-Nazi governance — which he had naively preserved — implicated dozens of other conspirators. He was executed on February 2, 1945.
The purge extended to people only tangentially connected to the conspiracy. Field Marshal Erwin Rommel had contact with conspirators and agreed Germany must seek peace, but his precise knowledge of the assassination plan remains historically debated. When conspirators under torture named him, Hitler sent two generals to Rommel's home on October 14, 1944, with an ultimatum: suicide by cyanide with a state funeral and family protection, or trial before the People's Court with family arrest. Rommel chose poison. He died at 1:00 PM. The Nazi regime announced he had died of injuries from an earlier Allied strafing attack. He received full military honors at his state funeral on October 18.
Some conspirators remained in custody for months. Wilhelm Canaris, the former head of the Abwehr (military intelligence), and Hans Oster, his deputy, had been arrested in July 1944 after documents discovered at Zossen revealed their involvement in earlier coup planning. They were held at Flossenbürg concentration camp.
Dietrich Bonhoeffer, the Lutheran pastor and theologian who had worked for the Abwehr and maintained international contacts for the resistance, had been arrested in April 1943 on currency violations. He was later linked to the July 20 plot through discovered documents.
On April 8, 1945 — less than one month before Germany's surrender — Hitler personally ordered the execution of Bonhoeffer, Canaris, Oster, and several other long-held prisoners. They were court-martialed at Flossenbürg and hanged on April 9. A camp doctor who witnessed Bonhoeffer's execution wrote: "I have hardly ever seen a man die so entirely submissive to the will of God."
"The whole world will vilify us now, but I am still totally convinced that we did the right thing. Hitler is the archenemy not only of Germany but of the world."
Henning von Tresckow — to aide Fabian von Schlabrendorff, July 21, 1944, hours before committing suicideMajor General Henning von Tresckow, the conspiracy's principal organizer, was at the Eastern Front when news of the July 20 failure arrived. On July 21, he told his aide Fabian von Schlabrendorff: "The whole world will vilify us now, but I am still totally convinced that we did the right thing. Hitler is the archenemy not only of Germany but of the world. When, in a few hours' time, I go before God to account for what I have done and left undone, I know I will be able to justify what I did in the struggle against Hitler." He then walked into no-man's-land and detonated a grenade against his head to avoid interrogation that would implicate others.
Judge Roland Freisler, who had presided over the executions of dozens of conspirators, died on February 3, 1945, when an American bomb hit the People's Court building during a trial. He was found crushed under a collapsed beam, still clutching the case files of defendant Fabian von Schlabrendorff, whose trial was in session. Schlabrendorff survived and lived until 1980.
The conspirators were not democrats in any modern sense. Many were Prussian aristocrats and conservative nationalists. Their plans for post-Hitler Germany were a complex mixture of progressive and reactionary elements.
The Kreisau Circle's constitutional plans called for decentralized federalism, religious freedom, social welfare programs, workers' participation in industrial management, and European economic integration. But they also included proposals to restore some version of the 1914 borders and to maintain a "defensive" frontier in the East.
Carl Goerdeler's detailed memoranda proposed immediate peace negotiations with the Western Allies while continuing the war against the Soviet Union — a plan that had no basis in strategic reality by 1944. He envisioned Germany keeping Austria, the Sudetenland, and parts of Poland.
The conspirators' foreign policy planning revealed deep contradictions. They wanted to overthrow Hitler, restore the rule of law, and end the Holocaust — but they also wanted to preserve German territorial gains and great power status. They fundamentally misunderstood that the Allies had committed to unconditional surrender and would not negotiate a separate peace that left Germany in control of conquered territories.
Hans Bernd Gisevius, the Abwehr officer who served as the conspiracy's contact with Allen Dulles and the OSS in Switzerland, was one of the few high-level conspirators to survive. He escaped to Switzerland after July 20 and later testified at the Nuremberg trials. His 1946 memoir, "To the Bitter End," became a primary source on the conspiracy but was controversial for implicating Wehrmacht officers in war crimes while portraying the resistance as morally opposed to Nazi policies from the beginning.
The moral and historical assessment of the July 20 conspirators remains contested. They acted against overwhelming odds and paid with their lives. Many had witnessed or learned of the Holocaust and were motivated by moral revulsion. Tresckow explicitly stated that the coup attempt must be made "even if it has no prospect of success" because "the German resistance movement must take the plunge before the eyes of the world and of history."
But the conspirators were also products of the system they sought to overthrow. Many had served Hitler loyally for years. Some had participated in or enabled war crimes. Their vision for post-Nazi Germany was not liberal democracy but a paternalistic, authoritarian conservatism that would preserve much of the existing social hierarchy.
The immediate impact of the failed coup was catastrophic for any remaining internal opposition. The purge eliminated most of the Wehrmacht's officer corps who had retained even minimal independence from Nazi ideology. The regime's final nine months became, if anything, more radicalized and fanatical.
After the war, West Germany slowly came to honor the July 20 conspirators. The Bendlerblock, where Stauffenberg was executed, became a memorial. Streets were renamed. But the recognition was not universal or immediate. Some Germans viewed the conspirators as traitors who had violated their military oaths during wartime.
The conspiracy's legacy is complex. They failed to kill Hitler. They failed to prevent Germany's total defeat. They failed to save the millions who died in the final year of the war. But they demonstrated that opposition to Hitler existed within Germany's military and civilian elite. They created a historical record that not all Germans supported or collaborated with the Nazi regime until the end.
Tresckow's final statement — that the coup must be attempted "before the eyes of the world and of history" — suggests the conspirators understood they were acting not just to change Germany's immediate political situation, but to create evidence that resistance had existed. In that limited sense, they succeeded.
The documentary evidence of Operation Valkyrie is extensive. The Gestapo interrogation records, trial transcripts, execution orders, and personal letters provide extraordinary detail about who knew what and when. The Nuremberg trials included testimony about the conspiracy. Surviving participants including Gisevius and Schlabrendorff published memoirs. The Kreisau Circle's constitutional drafts were preserved.
What remains contested is interpretation. Were the conspirators heroes who acted from moral conviction, or opportunists who turned against Hitler only when defeat became inevitable? Were their plans for post-Nazi Germany genuinely reformist, or merely a slightly less brutal version of authoritarian nationalism?
The evidence supports both readings. Individual conspirators had different motivations and different visions for Germany's future. Some, like Bonhoeffer and Moltke, articulated genuinely progressive principles. Others, like Goerdeler, combined opposition to Hitler's methods with support for German expansionism.
What is documented beyond dispute is this: on July 20, 1944, a group of German military officers and civilians attempted to kill Adolf Hitler and overthrow the Nazi regime. They failed. Over 200 of them were executed. Germany fought on for nine more months. The war they tried to end early killed millions more people before it finally concluded on May 8, 1945.