Many rescuers exhibited a longstanding commitment to help the needy. This commitment was reflected in their habitual engagement in a range of charitable activities. For example, beggars and vagabonds who reached Jan Rybak’s village had routinely been directed to him. Similarly, when neighbors were overburdened with chores, Rybak would step in to help.
According to Dr. Hans Münch, a colleague of Mengele’s at Auschwitz, Mengele arrived at the camp in a somewhat privileged position - he had been wounded on the Eastern front and was the recipient of an array of medals, including the Iron Cross. It would also appear that Mengele selected Auschwitz because of the opportunities there to continue his research. According to one source (Lifton, The Nazi Doctors) he did receive financial support for his work there. Support for continuing his professional career in genetics appears in another book, And the Violins Stopped Playing written by Alexander Ramati, where it is reported that a Professor Epstein told a comrade that "he (Mengele) has offered to prolong my life. Mind you, not to save it, just to prolong it, if I prepare a scientific paper on noma, which he would publish under his own name. It will keep him away from the front, he said, and justify his presence here as a scientist."

First published under the title Het Achterhuis. Dagboekbrieven 14 Juni 1942 – 1 Augustus 1944 (The Annex: Diary Notes 14 June 1942 – 1 August 1944) by Contact Publishing in Amsterdam in 1947, the diary received widespread critical and popular attention on the appearance of its English language translation Anne Frank: The Diary of a Young Girl by Doubleday & Company (United States) and Vallentine Mitchell (United Kingdom) in 1952. Its popularity inspired the 1955 play The Diary of Anne Frank by the screenwriters Frances Goodrich and Albert Hackett, which they adapted for the screen for the 1959 movie version. The book is included in several lists of the top books of the 20th century.[1][2][3][4][5][6]
At Auschwitz alone, more than 2 million people were murdered in a process resembling a large-scale industrial operation. A large population of Jewish and non-Jewish inmates worked in the labor camp there; though only Jews were gassed, thousands of others died of starvation or disease. During the summer of 1944, even as the events of D-Day (June 6, 1944) and a Soviet offensive the same month spelled the beginning of the end for Germany in the war, a large proportion of Hungary’s Jewish population was deported to Auschwitz, and as many as 12,000 Jews were killed every day.
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.
Cesarani notes that by 1943, as the military position of the German forces deteriorated, the Nazi leadership became more openly explicit about the Final Solution. In March, Goebbels confided to his diary: "On the Jewish question especially, we are in it so deeply that there is no getting out any longer. And that is a good thing. Experience teaches that a movement and a people who have burned their bridges fight with much greater determination and fewer constraints than those that have a chance of retreat."[127]
They set off at 11 p.m., in groups of ten. The first group emerged from the tunnel without incident. Zeidel recalled slithering on his stomach toward the edge of the camp. He scarcely dared to exhale; his heart slammed against his chest wall. Later, Farber would speculate that it was the snap of a twig that alerted their captors to the escape. Dogim attributed it to a blur of movement spotted by the guards.
The memory of this slightly built man, scarcely a hair out of place, his dark green tunic neatly pressed, his face well scrubbed, his Death's Head SS cap tilted rakishly to one side, remains vivid for those who survived his scrutiny when they arrived at the Auschwitz railhead. Polished boots slightly apart, his thumb resting on his pistol belt, he surveyed his prey with those dead gimlet eyes. Death to the left, life to the right. Four hundred thousand souls - babies, small children, young girls, mothers, fathers, and grandparents - are said to have been casually waved to the lefthand side with a flick of the cane clasped in a gloved hand.
The deportees were forced into rail cars, most of which were windowless, unheated cattle cars, and squeezed in so tightly that most were forced to stand. The doors were then sealed shut from the outside. Neither drinking water nor sanitary facilities were available. Each car held more than 120 people, and many froze or suffocated to death or succumbed to disease during the trip to the camps. The dead were not removed from the cars during the journey because the Nazi bureaucracy insisted that each body entering a car be accounted for at the destination.

Although Dr. Josef Mengele did not join the staff at Birkenau until May 1943, survivors testified during the Allied war crimes trials that he did selections in 1942. Besides the initial selection when the transport trains arrived at Birkenau, there were later selections of the women in the camp. Dr. Mengele was the chief doctor for the women's barracks, and he would periodically show up to select women for work or the gas chamber. One of the women who survived one of these selections was Sophia Litwinska, a Polish Jewess who was married to an Aryan man.
Germany invaded Norway and Denmark on 9 April 1940, during Operation Weserübung. Denmark was overrun so quickly that there was no time for an organized resistance to form. Consequently, the Danish government stayed in power and the Germans found it easier to work through it. Because of this, few measures were taken against the Danish Jews before 1942.[157] By June 1940 Norway was completely occupied.[158] In late 1940, the country's 1,800 Jews were banned from certain occupations, and in 1941 all Jews had to register their property with the government.[159] On 26 November 1942, 532 Jews were taken by police officers, at four o'clock in the morning, to Oslo harbour, where they boarded a German ship. From Germany they were sent by freight train to Auschwitz. According to Dan Stone, only nine survived the war.[160]

^ Jump up to: a b Andrew Rawson (2015). Auschwitz: The Nazi Solution. Pen and Sword. pp. 69, 87, 123. ISBN 1473855411. While the numbers considerably reduced through June and July [1944], nearly 440,000 Hungarian Jews were transported to Auschwitz in less than eight weeks; 320,000 were murdered. — Rawson, 144. Also in: S.J.; Carmelo Lisciotto (2007). "The Destruction of the Jews of Hungary". H.E.A.R.T. Of the 381,600 Jews who left Hungary between 15 May 1944 and 30 June 1944 it is probable that 200,000 – 240,000 were gassed or shot on 46 working days.
Josef Mengele had hoped to use the “research” he had garnered in Auschwitz in order to produce his Habilitation, a second, post-doctoral, dissertation required for admission to a university faculty as a professor in German-speaking lands. Instead, in January 1945, as the Soviet Army advanced through western Poland, Mengele fled Auschwitz. He spent the next few weeks at the Gross-Rosen concentration camp, until its evacuation. He then made his way west to evade capture by Soviet forces.
By this time, news of the mass murders had leaked out of occupied Europe via first-hand accounts from eyewitnesses, escapees and other informed persons. Newspapers such as The London Daily Telegraph and The New York Times also published occasional reports of executions along with death toll estimates. World reaction to the reports changed little from what it had been to prewar reports of Nazi persecution – a few political speeches from Britain and America.
The Roma refer to the genocide of the Romani people as the Pořajmos.[414] Because they are traditionally a private people with a culture based on oral history, less is known about their experience than that of any other group.[415] Bauer writes that this can be attributed to the Roma's distrust and suspicion, and to their humiliation because some of the taboos in Romani culture regarding hygiene and sex were violated at Auschwitz.[416] In May 1942, the Roma were placed under similar laws to the Jews. On 16 December 1942, Himmler issued a decree that "Gypsy Mischlinge [mixed breeds], Roma Gypsies, and members of the clans of Balkan origins who are not of German blood" should be sent to Auschwitz, unless they had served in the Wehrmacht.[417] He adjusted the order on 15 November 1943; in the occupied Soviet areas, "sedentary Gypsies and part-Gypsies are to be treated as citizens of the country. Nomadic Gypsies and part-Gypsies are to be placed on the same level as Jews and placed in concentration camps."[418] Bauer argues that this adjustment reflected Nazi ideology that the Roma, originally an Aryan population, had been "spoiled" by non-Romani blood.[419]
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. 
Mengele joined the Nazi Party in 1937 and the Schutzstaffel (SS; protection squadron) in 1938. He received basic training in 1938 with the Gebirgsjäger (light infantry mountain troop) and was called up for service in the Wehrmacht (Nazi armed forces) in June 1940, some months after the outbreak of World War II. He soon volunteered for medical service in the Waffen-SS, the combat arm of the SS, where he served with the rank of SS-Untersturmführer (second lieutenant) in a medical reserve battalion until November 1940. He was next assigned to the SS-Rasse- und Siedlungshauptamt (SS Race and Settlement Main Office) in Poznań, evaluating candidates for Germanization.[18][19]