In the final months of World War II, many  believed the nightmare was finally ending.   But then the Allied soldiers began opening  gates to places the Nazis never wanted seen.   What they found there were camps filled  with human suffering on a scale no one   had imagined and it would haunt the  soldiers for the rest of their lives.

The first major Nazi concentration camp  discovered almost completely intact was Majdanek,   located just outside the city of Lublin in eastern  Poland. On July 23, 1944, Soviet troops from the   2nd Belorussian Front entered the area during  their rapid advance westward. German forces had   retreated so fast that they did not have time to  destroy the camp or remove most of the evidence.

The camp began operating in October  1941, shortly after Nazi Germany   invaded the Soviet Union. At first, it  was built to hold Soviet prisoners of war,   many of whom died within weeks from  hunger, exposure, and disease. Over   time, the camp expanded and became both a  concentration camp and an extermination site.  

Prisoners arrived by train from Poland, Germany,  Czechoslovakia, France, the Netherlands,   and other occupied areas. Transports often arrived  without food or water after days of travel. By the time Soviet forces arrived, an  estimated 78,000 people had been murdered   at Majdanek. Around 59,000 of them were Jews.

  Others included Polish political prisoners,   members of resistance groups, Soviet  prisoners of war, Roma people,   and civilians accused of breaking  Nazi rules. Many were killed shortly   after arrival. Others were worked to death in  nearby factories, workshops, and labor details. The killing methods at Majdanek were varied and  constant.

 Gas chambers used Zyklon B pellets,   the same poison later associated with  Auschwitz. Some victims were shot in   mass executions near large pits. Others died  from starvation rations, brutal beatings,   untreated illness, or exhaustion from forced  labor. Death was part of daily camp life. What shocked Soviet soldiers most was how much  physical proof remained.

 Gas chambers were still   standing, with doors, vents, and residue still  visible. Crematorium ovens were intact and showed   clear signs of recent use. Nearby fields contained  piles of ashes dumped directly onto the ground.   Warehouses were filled with thousands of personal  belongings taken from victims just before death. Inside these storage buildings were mountains  of shoes, children’s clothing, eyeglasses,   suitcases with names written on them, cooking  pots, prayer items, and everyday objects.

Soviet troops also found execution pits filled  with human remains. They uncovered piles of   bones that had not been fully burned.  Even more damaging were the documents.   Camp records listed transport dates, prisoner  numbers, work assignments, and death counts.   These papers showed that the murders were  planned, recorded, and managed over time.

For the first time during the war, a Nazi killing  centre had been exposed before it could be erased. The discovery of Majdanek caused immediate  panic among Nazi leaders. Heinrich Himmler,   who controlled the SS and the camp system,  ordered camps close to advancing Allied   forces to be evacuated or destroyed.

  The goal was to move prisoners deeper   into Germany and eliminate any evidence  of mass killing before it could be seen. This led to forced evacuations that became  known as death marches. Beginning in late 1944   and continuing into early 1945, prisoners were  driven out of camps on foot with little food,   no warm clothing, and no medical  care. Marches lasted days or weeks.  

Anyone who collapsed from weakness or  illness was often shot immediately.   Thousands died along roadsides, in forests,  and in villages across occupied Europe. Some camps had already been erased  before Majdanek was discovered. Belzec,   Sobibor, and Treblinka were extermination  camps created under Operation Reinhard,   the Nazi plan to murder Jews in occupied  Poland.

 These camps did not function as   long-term prisons. Most people sent there  were killed within hours of arrival. By late 1943, after the majority of  Jews in the region had been murdered,   the Nazis dismantled these camps. Gas  chambers were torn down. Bodies were   dug up and burned. Ashes were scattered  or buried.

 Trees were planted to hide the   land. Small farms and buildings were  placed nearby to make the sites look   ordinary. Over 1.7 million Jews were murdered  at Belzec, Sobibor, and Treblinka combined. As Allied forces closed in during 1945,  the Nazis shifted priorities. They no   longer focused only on killing prisoners. They  focused on hiding what had already been done.

But despite every attempt to erase the evidence,   the system collapsed faster  than it could be hidden. Majdanek had exposed the truth early.  What followed would confirm that it   was not an exception, but part of a  continent-wide system of destruction. On January 27, 1945, soldiers of the Soviet 60th  Army reached the town of Oświęcim in southern   Poland.

 Just outside the town stood Auschwitz,  the largest and deadliest camp complex created   by Nazi Germany. It was not a single camp  but a massive system built for imprisonment,   forced labor, and mass murder. The complex  included Auschwitz I, the original camp;   Auschwitz II-Birkenau, the main killing  center; and Auschwitz III-Monowitz,   a labor camp tied to German industry. More than  forty smaller subcamps surrounded the area.

Auschwitz had been operating since May 1940.  At first, it held Polish political prisoners.   In 1942, it became the center of the Nazi plan  to murder Europe’s Jews. Trains arrived daily   from across the continent. Jews from Hungary,  Poland, France, Greece, Italy, and the Netherlands   were unloaded onto the ramp at Birkenau.  Many were killed within hours of arrival.

As Soviet forces moved closer in January  1945, the SS began evacuating the camp.   Around 60,000 prisoners were forced  out on foot toward Germany and Austria. When Soviet troops entered Auschwitz,  about 7,000 prisoners were still alive.   Most were too sick or weak to be marched  out.

 Among them were hundreds of children,   including twins and teenagers used for  medical experiments. Many survivors   could not understand that the guards  were gone and freedom had arrived. Inside the camp, Soviet soldiers  encountered scenes few could process.   Barracks were filled with corpses lying on wooden  bunks or on the floor.

 In Birkenau, the soldiers   found gas chambers and crematoria designed for  continuous killing. These buildings had rooms   for undressing, sealed chambers for poisoning, and  furnaces capable of burning bodies day and night. Near the crematoria and storage areas,  warehouses revealed the scale of the crime.   More than 370,000 men’s suits were stacked in  piles.

 Over 800,000 women’s dresses filled long   rows. Around 7 tons of human hair had been  collected, shaved from victims after arrival   and stored for industrial use. There were also  mountains of shoes, eyeglasses, toothbrushes,   cooking utensils, prayer items, and thousands of  prosthetic limbs taken from disabled prisoners. Auschwitz had murdered more than  1.1 million people.

 And after it,   denial was no longer possible. In February 1945, Soviet forces advancing through  Lower Silesia reached the concentration camp of   Gross-Rosen. The camp had been operating since  August 1940 and was originally a subcamp of   Sachsenhausen before becoming independent in 1941.

  Over the course of the war, more than 125,000   prisoners passed through it and its network of  subcamps. At least 40,000 people died there. Gross-Rosen was built around a massive granite  stone quarry. Prisoners were forced to extract   and haul heavy stone blocks by hand, often  while malnourished and beaten. The work was   intentionally exhausting.

 Many prisoners  collapsed under the weight of the stones   or fell from the quarry walls. Guards  regularly beat or shot those who could   not continue. Death from exhaustion,  injury, and starvation was common. As Soviet troops approached, the SS  evacuated most of the prisoners in   death marches toward camps farther west.

 By  the time the Red Army entered Gross-Rosen,   the camp was largely empty. What remained  told the story clearly. Mass graves   lay near the camp grounds. Barracks were burned  or destroyed in an attempt to hide evidence.   Survivors who had been left behind were too sick,  weak, or injured to move. Many were near death. Medical facilities at the camp were  almost nonexistent.

 Disease spread   quickly among those still alive.  Soviet medics struggled to save   those who could still be helped. Many  died in the days following liberation. As the Red Army continued west, more eastern camps  were uncovered. One of the last was Stutthof,   located near the city of Danzig on  the Baltic coast.

 Stutthof had been   operating since September 1939, making  it one of the earliest Nazi camps. Over   110,000 prisoners were held there  during the war. Around 65,000 died. In the final months, Stutthof became a dumping  ground for prisoners evacuated from other camps.   Overcrowding, hunger, and disease killed  thousands.

 As Soviet forces approached,   prisoners were marched toward the Baltic  Sea in freezing weather. Many were shot   along the way. Others were driven onto  the ice or into the water and drowned. Each camp uncovered by the Red Army added  more proof of a system built on destruction. On April 11, 1945, American forces from the 6th  Armored Division reached Buchenwald, located near   the city of Weimar in central Germany.

 Buchenwald  had been operating since July 1937 and was one of   the largest concentration camps inside Germany.  Unlike extermination camps such as Auschwitz,   Buchenwald was designed for forced labor,  punishment, and terror rather than mass gassing. Between 1937 and 1945, more than 280,000 prisoners  passed through Buchenwald and its many subcamps.   Prisoners included Jews, political opponents,  resistance members, prisoners of war, Roma,   homose*uals, and people labeled as criminals  by the Nazi state.

 At least 56,000 people died   from starvation, disease, executions,  medical experiments, and brutal labor. As American forces approached, SS guards  began fleeing the camp. In the final days,   prisoners organized secretly and staged a  partial uprising. They disarmed remaining   guards and took control of parts of the  camp shortly before U.S. troops arrived.

When American soldiers entered Buchenwald, they  encountered scenes that many would never forget.   Survivors were severely emaciated, some weighing  little more than children. Corpses were piled in   open areas and inside barracks, stacked without  care. Execution sites were still visible. Medical   rooms showed signs of experiments performed on  living prisoners without consent or anesthesia.

The smell of death filled the air and  could be detected far beyond the camp   gates. Civilians from nearby Weimar  were forced by American authorities   to walk through Buchenwald and see  the conditions. Many claimed they had   no knowledge of what had happened there. The  evidence around them told a different story.

Buchenwald proved that the concentration camp  system was not hidden only in occupied lands.   It existed inside Germany  itself, close to major cities,   supported by industry, and maintained for years. And more of these were waiting. On April 15, 1945, British troops from  the 11th Armoured Division entered the   Bergen-Belsen camp in northern Germany.

 They had  been warned that disease was spreading inside,   but nothing prepared them for what  they actually found. The scene inside   the camp would become one of the most  well-known images of the war in Europe. Bergen-Belsen was first created in 1940 as a  prisoner-of-war camp. In 1943, it was turned   into a prisoner exchange camp, where some Jews  were held to be traded for German civilians   abroad. This purpose quickly disappeared.

 By  1944, Bergen-Belsen became a dumping ground   for prisoners evacuated from camps closer to  the front lines. Trains arrived constantly,   unloading sick, starving people who had  already survived other camps and death marches. There were no gas chambers at  Bergen-Belsen. Killing was not   organized through poison or machinery.

  People died slowly from hunger, disease,   and complete neglect. Food rations  were cut to almost nothing. Clean water   became unavailable. Sanitation collapsed.  Barracks built for hundreds held thousands. When British forces arrived, around 60,000  prisoners were still alive inside the camp.   Most were severely malnourished. Many were too  weak to stand or speak.

 Another 13,000 bodies   lay unburied across the camp grounds, in open  fields, between barracks, and along pathways.   Death had become so constant that survivors  were forced to live beside corpses. Typhus was spreading uncontrollably. Lice  covered clothing and skin. Dysentery and   tuberculosis were widespread.

 The  camp’s water system had failed,   forcing prisoners to drink contaminated  water. Toilets no longer functioned. British medical teams and aid  workers acted immediately.   Emergency food stations were set up. Survivors  were moved to nearby facilities. Barracks were   burned to stop the spread of disease. Even  with help, thousands were too far gone.  

Their bodies could no longer recover. Many  died in the days and weeks after liberation. In total, more than 50,000 people died at   Bergen-Belsen. Nearly 14,000 of them  died after the camp was liberated. But even this camp was not the beginning. On April 29, 1945, American troops from  the 45th Infantry Division reached Dachau,   located near Munich in southern Germany.

  Dachau was the first Nazi concentration camp,   opened in March 1933, just weeks after Adolf  Hitler came to power. What began as a camp for   political opponents became the blueprint  for the entire concentration camp system. Over the next twelve years, Dachau  expanded into a network of subcamps   across southern Germany and Austria.

  More than 200,000 prisoners passed   through Dachau and its subcamps.  At least 41,000 people died there. As American soldiers approached Dachau,  they encountered a train standing on a   railway siding just outside the camp. Inside  the freight cars were around 2,000 bodies.   These prisoners had been transported from  Buchenwald.

 Most had died from starvation,   disease, or exposure during the  journey. Many had been dead for days. Inside the camp, conditions were  catastrophic. Barracks were packed   far beyond capacity. Prisoners were skeletal,  many unable to move. Disease spread unchecked.   Corpses lay in bunks, hallways, and  courtyards.

 Some had not yet been   removed because there was no one  left strong enough to carry them. The camp crematorium stood nearby,  still intact. Execution areas were   visible. Records showed systematic  punishment and killing over many years. The sight of the camp enraged many  American soldiers. Some guards who   had surrendered were shot on  the spot. Others were beaten.  

Military investigations later examined these  actions, but the reaction reflected the shock   and anger of men who had just witnessed  the results of twelve years of cruelty. And it had only ended because  the gates were forced open. As Allied armies moved deeper into Germany  in the spring of 1945, they uncovered dozens   of camps and hundreds of smaller subcamps spread  across cities, forests, factories, and mountains.  

These camps were tied together by rail lines  and paperwork, forming a single system that   stretched across the collapsing Reich. Many of  these places had received prisoners evacuated   from camps closer to the front, making  conditions even worse in the final months. One of the most shocking discoveries was  Mittelbau-Dora, located near Nordhausen in   central Germany. This camp was built around  underground tunnels carved into a mountain.  

Prisoners were forced to live and work entirely  below ground, assembling V-2 rockets used to   bombard cities like London and Antwerp. The  tunnels were dark, wet, and filled with dust.   Prisoners slept beside the machines they worked  on. Food was scarce, disease spread rapidly,   and beatings were routine.

 More than 60,000  prisoners passed through Mittelbau-Dora,   and over 20,000 died from starvation,  exhaustion, executions, and untreated illness. Another camp uncovered in the final weeks  was Flossenbürg, located in Bavaria near   the Czech border. Flossenbürg operated  from 1938 and held political prisoners,   resistance fighters, clergy, and people  accused of opposing the Nazi regime.  

Prisoners were forced to work in stone quarries  and armaments factories. Executions increased   sharply in the final year of the war.  More than 30,000 prisoners died at   Flossenbürg due to starvation, forced  labor, disease, and targeted killings. Mauthausen, liberated by U.S. forces on May 5,  1945, stood out for its extreme brutality.

 Located   in Austria near the Danube River, Mauthausen was  classified as a camp for “incorrigible” prisoners,   meaning survival was never expected.  Prisoners were forced to carry heavy   granite blocks up 186 steep steps from the  quarry below, a path known as the Stairway of   Death. Many fell and were crushed by those  behind them. Others were beaten or shot.  

At least 90,000 people died at Mauthausen from  overwork, starvation, exposure, and execution. Across Germany and Austria, similar scenes  repeated themselves. Camps like Neuengamme,   Sachsenhausen, Ravensbrück, and countless subcamps   were discovered in various states of  collapse. Food supplies had run out.  

Guards had fled or abandoned their posts.  Prisoners were left to die among the dead. Each camp had its own layout and purpose,  but the system behind them was always the   same. Prisoners were stripped  of identity, starved, beaten,   and worked until their bodies failed. Death was  not an accident. It was the expected result.

After the war ended, investigators began the  slow process of documenting what had happened.   Military teams, medical experts, and international   organizations entered the camps to  record evidence. Graves were opened.   Records were collected. Survivors were  interviewed. The task was overwhelming. As numbers were gathered, the scale  of the crime became clear.

 Around 10   million people were murdered in the  Holocaust. Entire families vanished.   Ancient communities were wiped out.  In many towns, no one returned. Researchers later identified more than  44,000 camps, ghettos, forced labor sites,   transit camps, and detention centers spread  across Nazi-controlled Europe.

 These sites   ranged from massive killing centers to small work  camps attached to factories or farms. Together,   they formed a system designed to control,  exploit, and destroy human beings. In November 1945, the Nuremberg Trials  put leading Nazi officials on trial   for war crimes and crimes against  humanity.

 During the proceedings,   footage from liberated camps was shown in  court. Judges, prosecutors, and defendants   watched images of skeletal survivors,  mass graves, gas chambers, and crematoria. Some Nazi leaders denied personal  responsibility. Others claimed they   were following orders or did not know  the full extent of the killings.

 These   arguments collapsed under the weight of  documents, photographs, and testimony. For the first time, the world saw  what modern mass murder looked like   when carried out by a powerful state.  It was not chaotic. It was structured. And it had been allowed to happen  while much of the world looked away.