Every day, twins were selected for experimentation. He would require that they give blood and sometimes so much was drawn that a twin would faint. Some underwent huge blood transfusions from one twin to the other. In an attempt to change their eye color, he painfully injected chemicals into their eyes, only to result in infection. One night he collected 7 sets of twins with different colored eyes, killed them, dissected them, and then sent the eyes to von Verschuer for analysis. Twins as young as 5 were killed from experiments, then their bodies dissected. For one pair of twins, he attempted to create conjoined twins by sewing their backs together and trying to connect blood vessels and organs. A few days after the extremely painful process, the twins developed gangrene and died. Many twins had their limbs and organs removed without the use of an anesthetic. Other experiments included isolation endurance, reactions to various stimuli, spinal taps without anesthesia, the removal of sexual organs, and incestuous impregnations. Out of the 1500 twins experimented on by Mengele, only around 200 survived the horror.
France had approximately 300,000 Jews, divided between the German-occupied north and the unoccupied collaborationist southern areas under the Vichy regime. The occupied regions were under the control of a military governor, and there, anti-Jewish measures were not enacted as quickly as they were in the Vichy-controlled areas.[163] In July 1940, the Jews in the parts of Alsace-Lorraine that had been annexed to Germany were expelled into Vichy France.[164] Vichy France's government implemented anti-Jewish measures in French Algeria and the two French Protectorates of Tunisia and Morocco.[165] Tunisia had 85,000 Jews when the Germans and Italians arrived in November 1942. An estimated 5,000 Jews were subjected to forced labor.[166]
However, the capital of this bureaucratized and industrialized world of mass murders was Auschwitz. An operative concentration camp since May 1940, in the autumn of 1941 it was equipped with gas chambers. According to the latest estimates, the number of Jews killed in this camp approximated 1.5 million. In Auschwitz II (Birkenau), symbol and synonym of the Holocaust, the Nazi program of mass extermination reached its highest level of “perfection.”
Same edition as the one I have read from my local library. This appears to be as fine an edition as you can get, and I have done a fair amount of research on that. This, the "definitive edition" has a lot of material that did not appear in the original one that was edited by Anne's father after the war. It also is on superior paper, with very readable type, and the photos are clearly rendered, compared to the other editions I have had in hand.

The Nazi concentration camps were established beginning in 1933 for the purpose of imprisoning political opponents. After the “Night of the Long Knives” (see Chapter 8, page 65), authority and management of the concentration camps was turned over to the S.S. The S.S. expanded the concentration camp system, and used these facilities to warehouse other “undesirables,” including hundreds of thousands of Jews. Dachau, Buchenwald and Sachsenhausen were among the first concentration camps built by the Nazis near Munich, Weimar, and Berlin respectively.
Word History: Totality of destruction has been central to the meaning of holocaust since it first appeared in Middle English in the 1300s, used in reference to the biblical sacrifice in which a male animal was wholly burnt on the altar in worship of God. Holocaust comes from Greek holokauston, "that which is completely burnt," which was a translation of Hebrew 'ōlâ (literally "that which goes up," that is, in smoke). In this sense of "burnt sacrifice," holocaust is still used in some versions of the Bible. In the 1600s, the meaning of holocaust broadened to "something totally consumed by fire," and the word eventually was applied to fires of extreme destructiveness. In the 1900s, holocaust took on a variety of figurative meanings, summarizing the effects of war, rioting, storms, epidemic diseases, and even economic failures. Most of these usages arose after World War II, but it is unclear whether they permitted or resulted from the use of holocaust in reference to the mass murder of European Jews and others by the Nazis. This application of the word occurred as early as 1942, but the phrase the Holocaust did not become established until the late 1950s. Here it parallels and may have been influenced by another Hebrew word, šô'â, "catastrophe" (in English, Shoah). In the Bible šô'â has a range of meanings including "personal ruin or devastation" and "a wasteland or desert." Šô'â was first used to refer to the Nazi slaughter of Jews in 1939, but the phrase haš-šô'â, "the catastrophe," became established only after World War II. Holocaust has also been used to translate ḥurbān, "destruction," another Hebrew word used as a name for the genocide of Jews by the Nazis.
The Germans required each ghetto to be run by a Judenrat, or Jewish council.[205] Councils were responsible for a ghetto's day-to-day operations, including distributing food, water, heat, medical care, and shelter. The Germans also required councils to confiscate property, organize forced labor, and, finally, facilitate deportations to extermination camps.[206] The councils' basic strategy was one of trying to minimize losses, by cooperating with German authorities, bribing officials, and petitioning for better conditions or clemency.[207]
Around 50,000 German gay men were jailed between 1933 and 1945, and 5,000–15,000 are estimated to have been sent to concentration camps. It is not known how many died during the Holocaust.[413][449] James Steakley writes that what mattered in Germany was criminal intent or character, rather than acts, and the "gesundes Volksempfinden" ("healthy sensibility of the people") became the guiding legal principle.[450] In 1936, Himmler created the Reich Central Office for the Combating of Homosexuality and Abortion.[451] The Gestapo raided gay bars, tracked individuals using the address books of those they arrested, used the subscription lists of gay magazines to find others, and encouraged people to report suspected homosexual behavior and to scrutinize the behavior of their neighbors.[450] Lesbians were left relatively unaffected;[413] the Nazis saw them as "asocials", rather than sexual deviants.[452] Gay men convicted between 1933 and 1944 were sent to camps for "rehabilitation", where they were identified by pink triangles.[450] Hundreds were castrated, sometimes "voluntarily" to avoid criminal sentences.[453] Steakley writes that the full extent of gay suffering was slow to emerge after the war. Many victims kept their stories to themselves because homosexuality remained criminalized in postwar Germany.[450]
Sometimes the mere presence of German troops in the vicinity was sufficient to spur a massacre. One example is what happened in the Polish village of Jedwabne, where neighbours murdered their Jewish neighbours. For years the massacre was blamed on the Germans, though many Poles likely knew that the local population had turned against its own Jews. In the Baltics, where the Germans were greeted as liberators by some segments of the population, the lure of political independence and the desire to erase any collaboration with the previous Soviet occupiers led nationalist bands to murder local Jews.
After the U.S. government refused to permit the passenger’s refuge, the St. Louis left Cuba for Europe. The St. Louis sailed so close to Florida that they could see the lights of Miami. The passengers were able to find refuge in other European countries so they didn’t have to return to Germany. Great Britain took 288, the Netherlands admitted 181; Belgium took 214, and 224 passengers found temporary refuge in France. When  Germany invaded Western Europe, 532 of the original passengers were trapped. Just over half survived the Holocaust.
Prisoners transported to these extermination camps were told to undress so they could shower. Rather than a shower, the prisoners were herded into gas chambers and killed. (At Chelmno, the prisoners were herded into gas vans instead of gas chambers.) Auschwitz was the largest concentration and extermination camp built. It is estimated that 1.1 million people were killed at Auschwitz.
The diary is taken to be a Holocaust document; that is overridingly what it is not. Nearly every edition—and there have been innumerable editions—is emblazoned with words like “a song to life” or “a poignant delight in the infinite human spirit.” Such characterizations rise up in the bitter perfume of mockery. A song to life? The diary is incomplete, truncated, broken off—or, rather, it is completed by Westerbork (the hellish transit camp in Holland from which Dutch Jews were deported), and by Auschwitz, and by the fatal winds of Bergen-Belsen. It is here, and not in the “secret annex,” that the crimes we have come to call the Holocaust were enacted. Our entry into those crimes begins with columns of numbers: the meticulous lists of deportations, in handsome bookkeepers’ handwriting, starkly set down in German “transport books.” From these columns—headed, like goods for export, “Ausgangs-Transporte nach dem Osten” (outgoing shipments to the east)—it is possible to learn that Anne Frank and the others were moved to Auschwitz on the night of September 6, 1944, in a collection of a thousand and nineteen Stücke (or “pieces,” another commodities term). That same night, five hundred and forty-nine persons were gassed, including one from the Frank group (the father of Peter van Daan) and every child under fifteen. Anne, at fifteen, and seventeen-year-old Margot were spared, apparently for labor. The end of October, from the twentieth to the twenty-eighth, saw the gassing of more than six thousand human beings within two hours of their arrival, including a thousand boys eighteen and under. In December, two thousand and ninety-three female prisoners perished, from starvation and exhaustion, in the women’s camp; early in January, Edith Frank expired.

Twins in the experiments describe three days of what must have been psychological examination and three days of laboratory experiments. "Three times a week we were marched to Auschwitz to a big brick building, sort of like a big gymnasium. They would keep us there for about six or eight hours at a time - most of the days. ..... We would have to sit naked in the large room where we first entered, and people in white jackets would observe us and write down notes. They also would study every part of our bodies. They would photograph, measure our heads and arms and bodies, and compare the measurements of one twin to another. The process seemed to go on and on." (Echoes from Auschwitz, Kor).
Mengele became interested in using twins for medical research through his mentor, Verschuer. Verschuer himself was famous for experimenting with identical and fraternal twins in order to trace the genetic origins of various diseases. During the 1930s, twin research was seen as an ideal tool in weighing the factors of human heredity and environment. Mengele and his mentor had performed a number of legitimate research protocols using twins as test subjects throughout the 1930s. Now, at Auschwitz, with full license to maim or kill his subjects, Mengele performed a broad range of agonizing and often lethal experiments with Jewish and Roma (Gypsy) twins, most of them children.
To come to the diary without having earlier assimilated Elie Wiesel’s “Night” and Primo Levi’s “The Drowned and the Saved” (to mention two witnesses only), or the columns of figures in the transport books, is to allow oneself to stew in an implausible and ugly innocence. The litany of blurbs—“a lasting testament to the indestructible nobility of the human spirit,” “an everlasting source of courage and inspiration”—is no more substantial than any other display of self-delusion. The success—the triumph—of Bergen-Belsen was precisely that it blotted out the possibility of courage, that it proved to be a lasting testament to the human spirit’s easy destructibility. “Hier ist kein Warum,” a guard at Auschwitz warned: here there is no “why,” neither question nor answer, only the dark of unreason. Anne Frank’s story, truthfully told, is unredeemed and unredeemable.
The murder industry began in the Chelmno camp, built in December 1941. Work was carried out in special trucks, where the victims were asphyxiated by exhaust fumes, a method that had been tried before on those whose lives were deemed useless (the “Euthanasia Pro­gram”). From September 1939, about 100,000 “Aryan” Germans were assassinated in this manner, in what was named “Operation T4.” Two years later, the personnel responsible for the “euthanasia” program were called upon to apply their expertise to murdering Jews. In the single camp of Chelmno, 150,000 human beings were gassed to death, most of them brought to the camp from annexed territories, the Warthegau district of western Poland and the Lodz Ghetto.

My mother was born in Sofia, Bulgaria, in 1943. The trains were standing by at the stations in Bulgaria’s major cities, waiting to transport Bulgaria’s 50,000 Jews to the death camps. The expulsion order had been given. An unusual coalition of clergy, intellectuals, and politicians, together with large-scale passive resistance by the Bulgarian people, at the last moment prevented Bulgarian Jewry from sharing the tragic fate of Jewish communities in neighboring countries and all over Europe.
Of the 430,000 sent to the first death camp at Bełżec in Poland, there were only two survivors. 700,000 were killed at Treblinka in just five months. In July, Himmler ordered that all Jews in key areas of Poland, except for those needed for essential labour, were to be killed by the end of the year. Most were. Despite Allied intelligence receiving detailed reports of the mass murders in Europe, the public reaction in Britain was largely a mixture of apathy and disbelief.
The next year, 1942, marked the beginning of mass murder on a scale unprecedented in all of human history. In January, fifteen top Nazis led by Reinhard Heydrich, second in command of the SS, convened the Wannsee Conference in Berlin to coordinate plans for the Final Solution. The Jews of Europe would now be rounded up and deported into occupied Poland where new extermination centers were being constructed at Belzec, Sobibor, Treblinka, and Auschwitz-Birkenau.
On April 30, 1945, surrounded by the Soviet Army in Berlin, Adolf Hitler committed suicide and his Reich soon collapsed. By now, most of Europe's Jews had been killed. Four million had been gassed in the death camps while another two million had been shot dead or died in the ghettos. The victorious Allies; Britain, the United States, and the Soviet Union, then began the daunting task of sorting through the carnage to determine exactly who was responsible. Seven months later, the Nuremberg War Crime Trials began, with 22 surviving top Nazis charged with crimes against humanity.
The Nazi killing site at Ponar is today known to scholars as one of the first examples of the “Holocaust by bullets”—the mass shootings that claimed the lives of upwards of two million Jews across Eastern Europe. Unlike the infamous gas chambers at places like Auschwitz, these murders were carried out at close range, with rifles and machine guns. Significantly, the killings at Ponar marked the transition to the Final Solution, the Nazi policy under which Jews would no longer be imprisoned in labor camps or expelled from Europe but exterminated.
The Diary of Anne Frank is the first, and sometimes only, exposure many people have to the history of the Holocaust. Meticulously handwritten during her two years in hiding, Anne's diary remains one of the most widely read works of nonfiction in the world. Anne has become a symbol for the lost promise of the more than one million Jewish children who died in the Holocaust.
In her diary, Anne wrote of her very close relationship with her father, lack of daughterly love for her mother (with whom she felt she had nothing in common), and admiration for her sister's intelligence and sweet nature. She did not like the others much initially, particularly Auguste van Pels and Fritz Pfeffer (the latter shared her room). She was at first unimpressed by the quiet Peter; she herself was something of a self-admitted chatterbox (a source of irritation to some of the others). As time went on, however, she and Peter became very close, though she remained uncertain in what direction their relationship would develop.

Otto Frank later described what it was like when the Nazis entered the annex in which he had been hiding. He said an SS man picked up a portfolio and asked whether there were any jewels in it. When Otto Frank said it only contained papers, the SS man threw the papers (and Anne Frank’s diary) on the floor, walking away with silverware and a candlestick in his briefcase. “If he had taken the diary with him,” Otto Frank recalled, “no one would ever have heard of my daughter.”
Twins in the experiments describe three days of what must have been psychological examination and three days of laboratory experiments. "Three times a week we were marched to Auschwitz to a big brick building, sort of like a big gymnasium. They would keep us there for about six or eight hours at a time - most of the days. ..... We would have to sit naked in the large room where we first entered, and people in white jackets would observe us and write down notes. They also would study every part of our bodies. They would photograph, measure our heads and arms and bodies, and compare the measurements of one twin to another. The process seemed to go on and on." (Echoes from Auschwitz, Kor).

But how he would enact such a plan wasn’t always clear. For a brief period, the Führer and other Nazi leaders toyed with the idea of mass deportation as a method of creating a Europe without Jews (Madagascar and the Arctic Circle were two suggested relocation sites). Deportation still would’ve resulted in thousands of deaths, though perhaps in less direct ways.

Majdanek, set up in September 1941 as a camp for Soviet prisoners‑of‑war and as a concentration camp for Polish Jews and non‑Jews, became the base for the SS advancing in the East and a reservoir of slave labor for factories in the Lublin region. Extermination installations were built there in the autumn of 1942, but it was only in the winter of the following year that the Zyklon B gas chambers and the crematorium were used­ for the first time. Of the 200,000 persons killed in Majdanek, about 50,000‑60,000 were Jews.
Before the war, Mengele had received doctorates in anthropology and medicine, and began a career as a researcher. He joined the Nazi Party in 1937 and the SS in 1938. He was assigned as a battalion medical officer at the start of World War II, then transferred to the Nazi concentration camps service in early 1943 and assigned to Auschwitz, where he saw the opportunity to conduct genetic research on human subjects. His subsequent experiments focused primarily on twins, with little regard for the health or safety of the victims.[2][3]