Last time: the intelligence war ran underneath nearly every front this series has followed — codebreakers and spies sometimes knowing the other side's next move before it happened. Intelligence and diplomatic channels were also, across those same years, accumulating detailed, credible reports of a different kind: what was happening to Europe's Jews. What did the governments reading those reports do with them? Unevenly, and often too slowly. Specific, credible information reached Allied governments by the second half of 1942 — assessed, in large part believed, and in some documented cases actively delayed — while the killing campaign that produced those reports continued; this part covers both the campaign and, plainly, what was and wasn't done with what was known about it.
This part has no mechanism tag, no prediction card, no debate meter, and no closing prompt asking you to weigh in. That is deliberate. What follows is not a system to model or a decision to second-guess from a safe distance. It is the systematic murder of six million Jewish people, and millions more from other targeted groups, carried out by a modern state with the deliberate participation of large parts of its bureaucracy, military, and civil society. This series treats that record differently than it treats strategy.
The legal architecture came years before the killing did. On September 15, 1935, at the Nazi Party’s rally in Nuremberg, the German government announced the Reich Citizenship Law and the Law for the Protection of German Blood and German Honor — the Nuremberg Laws. The first stripped Jews of full citizenship, defining a “citizen” as someone of “German or related blood.” The second criminalized marriage and sexual relations between Jews and non-Jewish Germans. Both defined “Jewish” by ancestry — three or four Jewish grandparents made a person fully Jewish under the law regardless of religious practice, with one or two grandparents creating a Mischlinge, or “mixed-race,” category subject to its own restrictions. Roma people and Black Germans were brought under related provisions. USHMM’s own account preserves a distinction worth keeping exactly: the Nuremberg Laws did not create Nazi antisemitism — persecution and exclusion were already underway — they gave it the machinery of state law. More anti-Jewish decrees followed, each narrowing what a Jewish person in Germany was legally permitted to do, own, or be.
On November 7, 1938, a 17-year-old Jewish refugee named Herschel Grynszpan, whose family had just been expelled from Germany to Poland, shot a German embassy official in Paris, Ernst vom Rath. Rath died two days later. Nazi leadership used his death as the pretext for a pogrom coordinated across Germany and annexed Austria on the night of November 9–10, 1938 — Kristallnacht, the “Night of Broken Glass.” More than 1,400 synagogues were destroyed or damaged; thousands of Jewish-owned businesses were vandalized and looted; thousands of homes were invaded. Hundreds of Jewish people died in the violence and its immediate aftermath, from direct assault, from shock, and by suicide. Approximately 26,000 Jewish men were arrested and sent to Dachau, Buchenwald, and Sachsenhausen; most were held for weeks under brutal conditions before release, and hundreds died in custody. Afterward, the German government fined the Jewish community itself a collective one billion Reichsmark “atonement payment,” and accelerated the forced transfer of Jewish-owned property into non-Jewish hands — a process already underway, now known by its German name, “Aryanization.” Kristallnacht is the documented pivot from legal and social persecution toward open, coordinated, state-sanctioned violence. It was not the end point. It was the hinge.
The German invasion and partition of Poland in September 1939 brought the largest Jewish population in Europe under German or Soviet occupation and began the process of ghettoization — forced concentration into sealed, overcrowded urban districts, the largest in Warsaw and Łódź, where disease and starvation killed tens of thousands before mass deportation had even begun. But the documented shift to systematic mass murder dates most clearly to June 1941 and the invasion of the Soviet Union. Following the German army were the Einsatzgruppen — mobile killing units of the Security Police and SD, roughly 3,000 personnel across four main formations, reinforced by Waffen-SS units, Order Police battalions, regular army units, Romanian forces, and local collaborators. Their method is documented in detail, including in the perpetrators’ own contemporaneous reports: Jews, along with Soviet political commissars, Roma, and others, were rounded up or ordered to report, marched to a killing site — often a ravine or a pit dug for the purpose — forced to remove their clothing and surrender their valuables, and shot, usually into the pit itself. Sealed vans routing engine exhaust into an enclosed compartment were also used at some sites, though shooting remained the primary method. USHMM’s figure for this phase: at least 1.5 million, and possibly more than 2 million, killed in mass shootings or gas vans on Soviet territory. The single deadliest documented episode was at Babyn Yar, a ravine near Kyiv, where German forces and local collaborators shot 33,771 Jews over two days in late September 1941.
On January 20, 1942, fifteen senior Nazi Party, SS, and German government officials met at a villa in Wannsee, a Berlin suburb, at a meeting convened by Reinhard Heydrich. The surviving protocol — one of the most closely studied documents of the twentieth century — shows the attendees, including Foreign Ministry and Justice Ministry representatives whose bureaucratic cooperation the killing program required, were told the SS would administer the deportation and murder of Jews across German-occupied Europe. No objection is recorded. It matters to be precise about what Wannsee was and was not: it did not begin the genocide. Mass shootings by the Einsatzgruppen were already underway, and the first experimental gassings, at Auschwitz and elsewhere, had already been tested. What Wannsee did was formalize an existing plan and coordinate the machinery — rail transport, deportation lists, jurisdiction across ministries and occupied territories — needed to carry it out at the scale that followed. USHMM’s own summary states plainly: “Never before had a modern state committed itself to the murder of an entire people.”
Six purpose-built killing centers operated in German-occupied Poland, distinct in kind from the wider network of concentration and labor camps across the Reich: Chełmno, Bełżec, Sobibor, Treblinka II, Majdanek, and the Auschwitz-Birkenau complex. These were not camps that killing happened to occur in. They were built and staffed to kill, on a schedule, using methods — carbon monoxide gas chambers at the earlier sites, Zyklon B hydrogen cyanide at Auschwitz — refined for that purpose. USHMM’s documented minimum death tolls, per site: Chełmno, at least 152,000; Bełżec, approximately 435,000; Sobibor, at least 167,000; Treblinka II, approximately 925,000; Auschwitz-Birkenau, approximately 1,000,000 — a figure that includes people gassed on arrival without ever being registered as prisoners.
Total figures are given here as ranges, because that is how the institutions maintaining this record present them — never as a single number claimed with more precision than the evidence supports.
A few of these categories deserve one further sentence, so a number doesn’t erase what made each its own campaign. People with disabilities were murdered from 1939 under a program the Germans called T4 — its gassing methods, and in places its staff, were later transferred to the killing centers in occupied Poland. Roma and Sinti communities were targeted by a parallel, only partially separate policy of persecution and mass killing, a campaign Romani communities call the Porajmos. Soviet prisoners of war are a distinct, documented atrocity under international law, overlapping with but not identical to the genocide of Europe’s Jews, named here as its own category rather than folded silently into one total.
How much of the gap between what was known and what was done is wartime fog and a genuine difficulty verifying an unprecedented claim, and how much is policy choices that could have gone otherwise, is a real, still-unresolved historiographical debate, not one this account will resolve for you. Walter Laqueur’s The Terrible Secret (1980) leans toward the former: information arrived in pieces, through channels of uncertain reliability, and the institutions receiving it struggled to process a claim of this scale. David Wyman’s The Abandonment of the Jews (1984) leans harder toward the latter, documenting specific choices: the State Department’s hold on the Riegner cable; restrictive American immigration policy that turned away refugees who might otherwise have escaped; and the decision not to bomb the rail lines feeding Auschwitz, or its gas chambers, despite Allied bombers operating within range of an IG Farben plant nearby by 1944. Both are serious historians reading much of the same record differently. This account leaves that disagreement standing rather than adjudicating it.
Resistance to this campaign is documented too, and belongs here as fact, not as a redemptive coda to the record above it. The largest Jewish uprising of the war, and the first urban uprising of any kind in German-occupied Europe, began in the Warsaw Ghetto on April 19, 1943, when German forces entered to begin its final liquidation and were met by armed resistance from the Jewish Combat Organization (ŻOB), commanded by 24-year-old Mordecai Anielewicz, and the smaller Jewish Military Union (ŻZW). Roughly 700 fighters, armed mostly with pistols, a handful of rifles, and improvised explosives, held off a German force of roughly 2,000 equipped with artillery and armor for close to a month, block by block. ŻOB headquarters fell on May 8; Anielewicz and much of his staff are believed to have died by suicide rather than surrender. At least 7,000 Jews died fighting or in hiding; roughly 7,000 more were captured and sent directly to Treblinka; most of the remaining roughly 42,000 ghetto residents were deported to forced-labor camps, most of them murdered that November in an operation the Germans called Aktion Erntefest, “Operation Harvest Festival.”
A second documented uprising took place at the Sobibor killing center on October 14, 1943. Planning began under Leon Feldhendler and was developed into an operational plan by Alexander Pechersky, a Red Army lieutenant and Soviet-Jewish prisoner of war who had arrived from Minsk the previous month. Prisoners killed eleven SS staff and guards; of roughly 600 held in the camp, close to 300 escaped into the surrounding forest. Only about 50 are believed to have survived the war. Prisoners who could not escape were shot the following day. The SS dismantled Sobibor soon after, bringing in prisoners from Treblinka to erase evidence of the camp’s existence before killing them too.
How ordinary people became the killers is itself a major, still-contested historiographical question, and it belongs here as documented scholarship, not as an experience for a reader to inhabit — this series treats perpetrators as documented, never as a role to occupy, and that rule holds nowhere more firmly than here. Raul Hilberg’s The Destruction of the European Jews (1961) remains the founding systematic study of the killing machinery, organizing its analysis around three categories — perpetrators, victims, bystanders — that still frame the field. Christopher Browning’s Ordinary Men (1992) is a close study of one German police battalion’s mass shootings, arguing that conformity and peer pressure, more than fanatical ideology, explain how non-elite reservists became killers. Daniel Goldhagen’s Hitler’s Willing Executioners (1996) uses much of the same evidence to argue the opposite — a specifically German “eliminationist antisemitism” as primary driver — a position widely and sharply contested, including by Browning himself, but a real position in an active disagreement, not a settled matter. Saul Friedländer’s two-volume Nazi Germany and the Jews (1997, 2007) integrates perpetrator decisions, victim experience drawn from contemporaneous diaries, and bystander response into one account, and is probably the closest scholarly model for the register this part has tried to hold. Timothy Snyder’s Bloodlands (2010) places the Holocaust within, without collapsing it into, the wider zone of mass killing between Nazi and Soviet policy across central and eastern Europe — including the Soviet POWs already noted above, not a separate story. One older, related disagreement — a genocidal intention from early on (Lucy Dawidowicz) versus a “Final Solution” that emerged through cumulative radicalization rather than one master plan (Martin Broszat, Hans Mommsen) — is a live question about when the intention hardened into policy, not about whether the killing was systematic, which every historian here accepts as fact.
What follows is drawn from real, archived testimony — recorded, catalogued, and held by name-searchable institutions built for exactly this purpose. It is described here rather than quoted verbatim in most cases, on the view that getting an exact quotation right, sourced to its precise timecode or page, is a discipline better served by consulting the archive directly than by secondhand paraphrase.
The USC Shoah Foundation's Visual History Archive holds more than 55,000 video testimonies in dozens of languages — the largest single collection of its kind, built from 1994 following Steven Spielberg's work on Schindler's List. Among the survivors whose testimony is part of the public record through this and related archives are Vladka Meed and Yitzhak Zuckerman on the Warsaw Ghetto resistance; Toivi Blatt, who wrote From the Ashes of Sobibor (1997) about the uprising he took part in; and Gerda Weissmann Klein, an Auschwitz and death-march survivor whose advocacy helped bring the Foundation into being.
USHMM's Jeff and Toby Herr Oral History Archive holds tens of thousands of interviews — not only Jewish survivors, but Roma, Jehovah's Witnesses, political prisoners, liberators, and rescuers. Filip Müller, who survived years in the Auschwitz-Birkenau Sonderkommando, and Abraham Bomba, a Treblinka survivor, are among the eyewitnesses whose testimony — first recorded for Claude Lanzmann's 1985 documentary Shoah — is held in Holocaust testimony archives: direct, first-hand accounts of the killing centers' internal operation, cited here as documented testimony rather than reproduced.
Not all documented testimony is oral. Renia Spiegel, a Polish-Jewish teenager, kept a diary from 1939 until shortly before her death in 1942, in Przemyśl; it survived, was discovered decades later, and was published in full as Renia's Diary (2019). An earlier, separate body of recorded testimony predates even that: in the summer of 1946, psychologist David Boder recorded more than 120 hours of interviews with Holocaust survivors and other displaced persons across Europe — the earliest systematic recordings of Holocaust survivor testimony in existence, published by Boder in 1949 as I Did Not Interview the Dead, and held today by the Illinois Institute of Technology's Voices of the Holocaust archive. The Fortunoff Video Archive at Yale University, founded in 1979, separately holds more than 4,400 recorded video testimonies. Yad Vashem, for its part, maintains the Central Database of Shoah Victims' Names — built substantially from pages of testimony submitted by survivors and relatives, to record the name of every individual victim rather than let any of the six million be represented only by the total.
The killing did not stop through Allied decision so much as it was overrun. Soviet forces reached and liberated Auschwitz-Birkenau on January 27, 1945; British forces reached Bergen-Belsen in mid-April; American forces reached Buchenwald and Dachau within the following weeks. What those soldiers found, and what the world did with evidence that could no longer be treated as rumor, is the subject of the next part in this series, not this one.
This part covers roughly a decade — from a set of laws passed at a party rally in 1935 to a killing system that, by the time Soviet troops reached it in January 1945, had already murdered most of the people it would ever murder. It happened inside a war this series has spent sixteen parts following, carried out by a government fighting that war on multiple fronts, using rail capacity, bureaucratic coordination, and administrative categories this series has, elsewhere, also described as evidence of a state’s competence. Competence and atrocity were not opposites here. They were the same machinery, aimed at a different purpose.