The selection at the ramp took seconds, sometimes less. A doctor in an SS uniform glanced at the arriving prisoner, gestured right or left with a flick of the hand, and the decision was made. In a typical transport, roughly seventy to seventy-five percent of the people who stepped down onto the platform were sent directly to the gas chambers, often within an hour of leaving the train. The children went, the elderly went, the sick went, and any mother who refused to let go of her child went with them, because the SS considered an adult with a small child useless for work.
For the majority of those deported to Auschwitz, life inside the camp did not last for weeks or months. It ended within minutes of arrival. This was the destination that Jewish families across Europe were being taken to while many still believed they were being brought somewhere they might wait out the war in safety. That belief began to dissolve the moment the trains rolled through the camp gates.
Auschwitz was not a simple prison. It was a system that controlled how long people were allowed to live. The camp stood near the Polish town of Oświęcim, roughly fifty kilometers west of Kraków. Before the Second World War, the site was not a concentration camp at all, but a collection of old Polish army barracks.
In April 1940, Heinrich Himmler, the head of the SS, ordered the construction of a concentration camp there. Its initial purpose was to imprison Polish political prisoners and members of the growing Polish resistance against the German occupation. The first prisoners arrived on June 14, 1940: 728 Polish men, mostly students and soldiers, transferred to Auschwitz from a nearby prison in the city of Tarnow. This original camp later became known as Auschwitz I.
At that stage, it was not designed as a place of mass killing. The Nazis used it chiefly as a prison and forced-labor camp. The man placed in charge of Auschwitz from the beginning was Rudolf Höss, an SS officer who had joined the Nazi Party in the 1920s. By late 1941, Nazi Germany was fighting a vast war against the Soviet Union on the Eastern Front.
The German army was taking heavy losses, and the war was lasting far longer than Nazi leaders had expected. At the same time, those leaders were moving toward a plan to kill the entire Jewish population of Europe. On January 20, 1942, senior Nazi officials met in a villa in Wannsee, near Berlin, to coordinate what they called the Final Solution: their plan to deport and murder the Jews of Europe. Auschwitz was already being expanded, and it soon became one of the principal places where that plan was carried out.
Construction had begun in October 1941 on a second, much larger camp, about three kilometers from the original Auschwitz. It was named Auschwitz II-Birkenau. This is the part of Auschwitz most people recognize today. Unlike the original camp, Birkenau was built on a scale that could handle enormous numbers of prisoners and deportees.
The Nazis used a chemical pesticide called Zyklon B to kill people in the gas chambers. It had originally been developed as an insecticide to kill vermin and disinfect spaces, but the SS turned it into a weapon of mass murder. In September 1941, Nazi guards tested it on Soviet prisoners of war and sick prisoners in the basement of Block 11 in Auschwitz I. The gas killed large numbers of people without the guards having to shoot each victim individually.
The Nazis saw it as an efficient method, and the test helped establish the technique that would later be used on a far larger scale. By the spring of 1942, gas chambers were operating regularly in Birkenau, and trains carrying Jewish families from across Europe were already arriving. Auschwitz had changed completely from what it was when the first Polish prisoners arrived in 1940. Deportations expanded across Europe as the Nazis and their collaborators rounded up Jewish communities country by country.
French Jews began arriving in March 1942. Slovak Jews were deported that same month under an agreement between the Slovak government and Nazi Germany. Transports from the Netherlands began arriving in July 1942, and these included Jewish families like the Franks, though Anne Frank herself was not deported to Auschwitz until more than two years later. Greek Jews, especially those from the city of Salonika in northern Greece, were deported mainly between March and August 1943, with about 48,000 sent from Salonika alone.
These deportations were organized with the involvement of SS officer Dieter Wisliceny, who worked directly with Adolf Eichmann’s office in Berlin. Eichmann was one of the chief Nazi officials responsible for organizing the deportation of Jews from occupied Europe. The largest wave came from Hungary. Between May and July 1944, about 430,000 Hungarian Jews were deported to Auschwitz in just eight weeks.
The operation moved so quickly that Rudolf Höss, who had temporarily left his post as camp commandant, was brought back specifically to organize the deportations and mass killing. Historians later referred to this period as Operation Höss. Some days, four or five trains arrived, each carrying around 3,000 people. The sheer number of people sent to their deaths pushed the killing system at Auschwitz to its limits.
By the time transports finally stopped in late 1944, more than 1. 3 million people had been deported to Auschwitz. Most were Jews, though Poles, Roma, Soviet prisoners of war, and members of other groups were imprisoned there as well. The trains carrying deportees did not simply stop at an ordinary railway station outside the camp.
By 1944, trains were able to stop at a railway ramp inside Birkenau itself, an area prisoners called “the ramp. ” This allowed the SS to unload people close to the gas chambers and crematoria. Before that internal railway ramp was completed, many transports were unloaded at a station near the town of Oświęcim, and prisoners were taken to the camp by truck or on foot. After days of being packed inside overcrowded cattle cars, people finally stepped onto the ramp.
Many had received little or no food or water during the journey, there was almost no room to sit or move, and the cars had no proper toilets. Some people had already died by the time the doors were opened. The SS guards immediately ordered the survivors to leave their luggage behind and line up in separate columns, men on one side, women and children on the other. Then came one of the most critical moments in the entire Auschwitz system: selection.
SS doctors and officers quickly examined the arriving prisoners. Within a few seconds, they decided who looked strong enough to work and who would be sent directly to the gas chambers. One of the most infamous doctors involved was Josef Mengele, an SS officer who arrived at Auschwitz in May 1943. He became notorious for conducting medical experiments on prisoners, especially twins and children.
But Mengele was not the only doctor involved in selections. Many SS doctors took turns performing this duty. The smaller group chosen for forced labor faced a different process, but survival was still far from guaranteed. These prisoners were generally men and women who appeared physically capable of work, often between the ages of fifteen and forty-five.
After selection, they were entered into the camp’s prisoner registration system, where the Nazis began stripping them of their identity and turning them into mere numbers. They were forced to remove all their clothes and were usually shaved, sometimes over their entire bodies. The Nazis claimed shaving was necessary to control lice and disease, but it served another purpose as well. Prisoners were stripped of their hair, clothes, belongings, and appearance, which made it easier for the camp system to treat them as anonymous prisoners rather than individual human beings.
After washing and disinfection, they were given the camp’s striped prisoner uniforms. The clothing was thin, offered little protection against the cold, and often did not fit. Then came the tattooing. Auschwitz was the only major Nazi concentration camp where prisoners were routinely given permanent identification tattoos.
The practice spread widely in 1943 as the prisoner population grew and the SS needed a faster way to identify them. The number was usually tattooed on the forearm and became the prisoner’s official identity inside the camp. From that moment on, guards often called prisoners by their numbers instead of their names. The system was designed to make prisoners easier to control and easier to replace.
Those assigned to barracks entered a daily routine built on exhaustion, hunger, and constant pressure. Wake-up came before sunrise, often around 4:30 in the morning. Prisoners then had to assemble outside for roll call, standing in long rows while guards counted them. Roll call could last for hours, even in freezing weather.
The guards counted prisoners repeatedly to make sure their records matched the people standing before them and to see whether anyone had escaped or died during the night. Food was deliberately kept far below what a person needed to survive and perform heavy physical labor. The typical daily ration provided roughly 1,300 to 1,700 calories: usually a small piece of dark bread, a bowl of thin soup made from poor-quality or spoiled vegetables, and a bitter drink that resembled coffee but offered almost no nutrition. An adult doing heavy physical work normally needs about 2,500 to 3,000 calories a day to maintain body weight.
Auschwitz prisoners often received less than half of that while being forced to work up to twelve hours a day. These numbers help explain why prisoners weakened so quickly. After only a few weeks on these rations, their bodies began consuming stored fat and then muscle for energy. Their weight dropped, their strength faded, and simple physical tasks became harder.
Within two or three months, many prisoners reached a condition inmates called “Musselman,” camp slang for someone who had become so weak and emaciated, often with sunken eyes and a hunched posture, that they no longer had the energy to respond to orders. Another part of the Auschwitz system was Auschwitz III-Monowitz, whose construction began in 1942 next to a large industrial complex producing synthetic rubber and fuel. The factory was run by IG Farben, one of Germany’s largest chemical companies, and the camp supplied the company with slave labor. Prisoners who worked inside the factories faced terrible conditions too, but some jobs offered slightly better protection from the weather than outdoor work.
The company also had an economic reason to keep skilled workers alive and working, at least as long as they remained useful. Yet even there, survival was far from guaranteed. Of the roughly 35,000 Jewish prisoners who passed through Monowitz, about 25,000 died. The SS selections did not end at the railway ramp.
They were carried out inside the camp every few weeks. SS doctors and other officials examined prisoners who looked weak or sick. They often went through the camp infirmary, known as the Revier, looking for prisoners who could no longer work. Anyone deemed too weak was taken out and sent to the gas chambers.
There were also surprise inspections during morning roll call. Prisoners might be ordered to undress and walk quickly past a doctor who assessed their physical condition in seconds. There was no real medical examination and little concern about whether a prisoner might recover. The basic question was whether that person was still useful to the camp’s labor system that day.
This meant that a minor illness could become fatal if a prisoner was discovered at the wrong moment. Disease was another major cause of death. Typhus, a serious illness spread by lice, swept through the crowded, filthy barracks again and again. Prisoners lived packed together in poor sanitary conditions, with a lack of clean water, inadequate clothing, and almost no medical treatment.
A major typhus outbreak in the summer of 1942 killed hundreds of prisoners within weeks. The SS did not simply treat the sick; they used the outbreak as a pretext for mass selections and the evacuation of entire prisoner blocks. For prisoners, survival often meant trying not to attract attention for the wrong reasons. They had to hide their wounds, fevers, infections, and any other signs of weakness whenever they could.
Merely looking sick was enough to draw the attention of an SS doctor, and appearing weak during morning roll call could have deadly consequences. One group inside Auschwitz faced a completely different survival timeline: the Sonderkommando, meaning “special unit. ” These were prisoners, mostly Jewish men, forced by the SS to work directly around the gas chambers and crematoria. Their tasks included pulling bodies out of the gas chambers, transporting them to the crematoria, operating the furnaces, and extracting valuables such as gold teeth from the dead for the SS to collect.
The Sonderkommando were forced to witness the most secret aspects of the extermination process. Because the Nazis did not want these prisoners to survive and tell what they had seen, the SS regularly replaced the members of these units. New prisoners were brought in to take their place, while many who had worked there before were killed. Sonderkommando members generally received slightly better food than ordinary prisoners, but that was mainly because the work was so demanding and the SS needed them physically capable of doing it.
Their relative access to food did not make them safe. They knew that their knowledge itself might eventually become the reason for their murder. On October 7, 1944, members of the Sonderkommando finally launched an armed revolt. Prisoners working at Crematorium IV used gunpowder that had been secretly smuggled into the camp by Jewish women working in a nearby German munitions factory.
Roza Robota was one of the women involved in this operation. The prisoners used the explosives to damage the crematorium and then attacked the SS guards. Several SS men were killed or wounded, but the Germans quickly suppressed the uprising. The prisoners who took part were hunted down and killed.
Roza Robota and three other women were publicly hanged on January 6, 1945, for helping to smuggle the explosives, just weeks before the Soviet army reached Auschwitz. The revolt did not destroy the camp or stop the mass killing, but it showed that resistance was still possible, even inside the most heavily guarded parts of Auschwitz. When historians combine the camp’s surviving records with survivor testimony, they can see a general pattern, though there was never a fixed survival period. For prisoners who passed selection at Birkenau and were sent to general forced labor, survival could be measured in months rather than years.
Monowitz could offer a slightly longer survival period for prisoners whose skills were considered valuable to the factories. For workers there, survival might stretch to roughly four to six months or more, depending on their jobs, their physical condition, and the camp’s changing needs. Some prisoners survived for two years or longer, especially those who obtained inside positions such as administrative work, kitchen duties, or jobs in the infirmary. But the whole system remained unpredictable, with positions changing every few weeks.
By late 1944, the course of the war had clearly turned against Germany. Soviet forces were advancing west across Poland, and it became increasingly likely that Auschwitz would soon fall to the Soviets. The SS began trying to destroy evidence of what had happened there. In November 1944, they demolished several crematoria buildings in Birkenau and began burning documents that might reveal the scale of the mass killing carried out inside the camp.
The gas chambers had largely stopped operating by late 1944. The massive Jewish prisoner transports that had once arrived almost daily slowed to a halt, especially after the destruction of most of Hungary’s Jewish population. But the end of the gas chambers did not make Auschwitz a safer place. The German war effort was collapsing and the supply system was falling apart.
Less food, medicine, and basic supplies reached the remaining prisoners. Hunger and disease continued to claim lives even without the mass selections that had previously sent thousands to the gas chambers. By mid-January 1945, Soviet forces were dangerously close to Auschwitz. The SS now faced a problem.
They did not want thousands of prisoners liberated alive to tell the world what they had seen. Instead of leaving prisoners behind, the Nazis decided to evacuate the camp and march them west, deeper into territory still under German control. Starting around January 17 and 18, roughly 56,000 to 58,000 prisoners from Auschwitz and its surrounding sub-camps were forced to leave on foot. They were sent out in the middle of a brutally cold Polish winter.
Many had already spent months or years suffering from hunger, disease, and forced labor. They were given little food or water and had almost no protection from the cold. The columns marched dozens of kilometers toward concentration camps deeper inside Germany, including Gross-Rosen and Buchenwald. Prisoners who became too weak to keep up, slowed down, or collapsed were often shot by SS guards.
Thousands died along the roads from exhaustion, hunger, exposure to the freezing weather, and direct execution. On January 27, 1945, Soviet troops from the 60th Army of the 1st Ukrainian Front entered the Auschwitz camp complex. By that time, most prisoners had already been evacuated. The Soviet soldiers found about 7,000 people still alive inside the camp.
Many were prisoners too sick, weak, or exhausted to take part in the death marches days earlier. The survivors were in extremely poor physical condition. Many were severely malnourished and had been suffering from untreated diseases for months. Others had frostbite and were so weak they could barely move.
In a cruel irony, being too sick to leave Auschwitz may have been what saved their lives. These prisoners were left behind when the SS evacuated the camp, while thousands of the stronger prisoners forced onto the death marches died along the roads before reaching any safety.
