Transportation between camps was often carried out in freight cars with prisoners packed tightly. Long delays would take place; prisoners might be confined in the cars on sidings for days.[190] In mid-1942 work camps began requiring newly arrived prisoners to be placed in quarantine for four weeks.[191] Prisoners wore colored triangles on their uniforms, the color of the triangle denoting the reason for their incarceration. Red signified a political prisoner, Jehovah's Witnesses had purple triangles, "asocials" and criminals wore black and green. Badges were pink for gay men and yellow for Jews.[192] Jews had a second yellow triangle worn with their original triangle, the two forming a six-pointed star.[193][194] In Auschwitz, prisoners were tattooed with an identification number on arrival.[195]
As the tide of World War II turned against the Nazis, they began a systematic plan to eliminate or "liquidate" the ghettos they had established, by a combination of mass murder on the spot and transferring the remaining residents to extermination camps. When the Nazis attempted to liquidate the Warsaw Ghetto on April 13, 1943, the remaining Jews fought back in what has become known as the Warsaw Ghetto Uprising. The Jewish resistance fighters held out against the entire Nazi regime for 28 days, longer than many European countries had been able to withstand Nazi conquest.

Concentration camps were top priority in the conference. ""Nazis would trap Jews in ghettos'' said Himmler. Then they were taken to death camps. Auschwitz mainly. They killed 1 to 3 million people there. '' Under proper guidance in the Final Solution the Jews are to be relocated for appropriate  labor in the east. Able-bodied Jews will be separated according to sex. Then taken in large work columns to work on roads of course many will die of natural causes.'' Himmler said this during the conference.

Historians increasingly view the Holocaust as a pan-European phenomenon, or a series of holocausts impossible to conduct without the help of local collaborators.[47] Over 200,000 people are estimated to have been Holocaust perpetrators;[48] without them, the Germans would not have been able to extend the Holocaust across most of Europe.[49] Some Christian churches tried to defend the Jews by declaring that converted Jews were "part of the flock," according to Saul Friedländer, "but even then only up to a point". Otherwise, Friedländer writes, "[n]ot one social group, not one religious community, not one scholarly institution or professional association in Germany and throughout Europe declared its solidarity with the Jews."[50]
This was more than an exaggerated adolescent flourish. She had already intuited what greatness in literature might mean, and she clearly sensed the force of what lay under her hand in the pages of her diary: a conscious literary record of frightened lives in daily peril; an explosive document aimed directly at the future. In her last months, she was assiduously polishing phrases and editing passages with an eye to postwar publication. Het Achterhuis, as she called her manuscript, in Dutch—“the house behind,” often translated as “the secret annex”—was hardly intended to be Anne Frank’s last word; it was conceived as the forerunner work of a professional woman of letters.
He was capable of being so kind to the children, to have them become fond of him, to bring them sugar, to think of small details in their daily lives, and to do things we would genuinely admire ... And then, next to that, ... the crematoria smoke, and these children, tomorrow or in a half-hour, he is going to send them there. Well, that is where the anomaly lay.[48]
Before the the Final Solution the plan the Nazis had was to force the Jews to immigration. In 1940 the nazis planed to ship the Jews to an Island in the Indian ocean called Madagascar. it was not until later they referred to the Final Solution as genocide rather than territorial Final Solution. As the nazis were under cover of the war they developed technology to successfully murder millions of Jews. details were worked out at the Wansee Conference. All Jews in Germanys occupied countries were sent to ghettos as holding areas. Many were sent to camps were they worked under brutal conditions. Many were sent to gas chambers. As the Allies advanced death marches cut down the number of potential survivors. Some of Hitler's objectives were to wage to wars at once one aimed at anyone who objected him the other at the Jews. Hitler's success was credited to planed steps and reaction to those of other world powers. 

Peter Longerich argues that the search for a finite date on which the Nazis embarked upon the extermination of the Jews is futile, in his book Holocaust: The Nazi Persecution and Murder of the Jews (2011). Longerich writes: "We should abandon the notion that it is historically meaningful to try to filter the wealth of available historical material and pick out a single decision" that led to the Holocaust.[116][117]
Hitler’s worldview revolved around two concepts: territorial expansion (that is, greater Lebensraum—“living space”—for the German people) and racial supremacy. After World War I the Allies denied Germany colonies in Africa, so Hitler sought to expand German territory and secure food and resources—scarce during World War I—in Europe itself. Hitler viewed the Jews as racial polluters, a cancer on German society in what has been termed by Holocaust survivor and historian Saul Friedländer “redemptive anti-Semitism,” focused on redeeming Germany from its ills and ridding it of a cancer on the body politic. Historian Timothy Snyder characterized the struggle as even more elemental, as “zoological,” and “ecological,” a struggle of the species. Hitler opposed Jews for the values they brought into the world. Social justice and compassionate assistance to the weak stood in the way of what he perceived as the natural order, in which the powerful exercise unrestrained power. In Hitler’s view, such restraint on the exercise of power would inevitably lead to the weakening, even the defeat, of the master race.
Anne Frank's extraordinary diary, written in the Amsterdam attic where she and her family hid from the Nazis for two years, has become a world classic and a timeless testament to the human spirit. Now, in a new edition enriched by many passages originally withheld by her father, we meet an Anne more real, more human, and more vital than ever. Here she is first and foremost ...more
Mengele was an attractive man. A perennial little smile showed the gap between his front teeth. Immaculately dressed in jodhpurs, he wore a cap bearing the SS insignia and carried the obligatory riding crop, constantly slapping it against his gleaming black boots. Whenever he spoke to me, he was very polite, giving the impression that he was interested in me. It was hard to believe that his little smile and courteous behavior were just a facade behind which he devised the most horrific murderous schemes.
The 15 men present at Wannsee included Adolf Eichmann (head of Jewish affairs for the RSHA and the man who organized the deportation of Jews), Heinrich Müller (head of the Gestapo), and other party leaders and department heads.[256] Thirty copies of the minutes were made. Copy no. 16 was found by American prosecutors in March 1947 in a German Foreign Office folder.[263] Written by Eichmann and stamped "Top Secret", the minutes were written in "euphemistic language" on Heydrich's instructions, according to Eichmann's later testimony.[264] The conference had several purposes. Discussing plans for a "final solution to the Jewish question" ("Endlösung der Judenfrage"), and a "final solution to the Jewish question in Europe" ("Endlösung der europäischen Judenfrage"),[256] it was intended to share information and responsibility, coordinate efforts and policies ("Parallelisierung der Linienführung"), and ensure that authority rested with Heydrich. There was also discussion about whether to include the German Mischlinge (half-Jews).[265] Heydrich told the meeting: "Another possible solution of the problem has now taken the place of emigration, i.e. the evacuation of the Jews to the East, provided that the Fuehrer gives the appropriate approval in advance."[256] He continued:

The first such extermination camps were introduced during Operation Reinhardt, which targeted the elimination of the Jewish people within the General Government of Occupied Poland and Ukraine. After the first killing center open at Chelmno, the use of these extermination tactics spread quickly. At the height of deportations, the Birkenau killing center murdered 6,000 Jews a day.

After Kristallnacht, Jewish businesses were expropriated, private employers were urged to sack Jewish employees, and offices were set up to speed emigration. Imprisoned Jews could buy freedom if they promised to leave the country, abandoning their assets. By the outbreak of war in September 1939, half of Germany's 500,000 Jews had fled, as had many Jews from Austria and the German-occupied parts of Czechoslovakia.
After the German invasion of Czechoslovakia in 1939, the Nazis sent many thousands of Czech Jews to ghettos in Poland, Lithuania and Latvia. On 22 June 1941, the German invasion of the Soviet Union brought many more Jews within the German sphere of influence. Some Polish Jews had managed to escape into the Soviet Union during the German invasion of Poland. Now, as the German army rolled into the Soviet Union, they were again trapped.
Over the decades that followed, ordinary Germans struggled with the Holocaust’s bitter legacy, as survivors and the families of victims sought restitution of wealth and property confiscated during the Nazi years. Beginning in 1953, the German government made payments to individual Jews and to the Jewish people as a way of acknowledging the German people’s responsibility for the crimes committed in their name.
The unabashed triflings of Cara Wilson—whose “identification” with Anne Frank can be duplicated by the thousand, though she may be more audacious than most—point to a conundrum. Never mind that the intellectual distance between Wilson and Anne Frank is immeasurable; not every self-conscious young girl will be a prodigy. Did Otto Frank not comprehend that Cara Wilson was deaf to everything the loss of his daughter represented? Did he not see, in Wilson’s letters alone, how a denatured approach to the diary might serve to promote amnesia of what was rapidly turning into history? A protected domestic space, however threatened and endangered, can, from time to time, mimic ordinary life. The young who are encouraged to embrace the diary cannot always be expected to feel the difference between the mimicry and the threat. And (like Cara Wilson) most do not. Natalie Portman, sixteen years old, who will début as Anne Frank in the Broadway revival this December of the famous play based on the diary—a play that has itself influenced the way the diary is read—concludes from her own reading that “it’s funny, it’s hopeful, and she’s a happy person.”
Along with several other Auschwitz doctors, Mengele transferred to Gross-Rosen concentration camp in Lower Silesia on 17 January 1945, taking with him two boxes of specimens and the records of his experiments at Auschwitz. Most of the camp medical records had already been destroyed by the SS[57][58] by the time the Red Army liberated Auschwitz on 27 January.[59] Mengele fled Gross-Rosen on 18 February, a week before the Soviets arrived there, and traveled westward to Žatec in Czechoslovakia, disguised as a Wehrmacht officer. There he temporarily entrusted his incriminating documents to a nurse with whom he had struck up a relationship.[57] He and his unit then hurried west to avoid being captured by the Soviets, but were taken prisoners of war by the Americans in June 1945. Although Mengele was initially registered under his own name, he was not identified as being on the major war criminal list due to the disorganization of the Allies regarding the distribution of wanted lists, and the fact that he did not have the usual SS blood group tattoo.[60] He was released at the end of July and obtained false papers under the name "Fritz Ullman", documents he later altered to read "Fritz Hollmann".[61]