The first resettlement of Jews into the ghetto occurred back in 1555. However, the experience of leaving their homes and leaving all their property in favor of the state of France back in 1306. For centuries, Jews suffered persecutions similar to those they experienced in the Holocaust, and these persecutions and disasters typically occurred on the 9th of Av. The first extermination death camps appeared during the First World War in Europe and Turkey. The construction of the largest death camps used for the mass extermination of people in the era of World War 2 began long before the war itself, at the beginning of the 20th century. One of the first camps to appear was Buchenwald, Theresienstadt, and Thalerhof. Death camps were originally institutions for the mass extermination of people through the use of free resources - hunger, cold, dehydration, bacteria, backbreaking labor, depersonalization and abuse. Places with an unfavorable climate were chosen for the construction of camps. When transported to the camps, more than 90% of the people sent to them died on the road. Transportation was carried out in stages, from camp to camp, the prisoners made the main part of the journey on foot, or in railway cars, in which they rode mostly completely naked. The hierarchy of the organization of death camps repeated the structure of the hierarchy of Cosa Nostra clans. The main camp personnel who did the dirty work (kapos, sonderkommandos) were selected from among the prisoners themselves, marked with a green triangle. The color green in the camps of Nazi Germany marked the criminal element, which represented the main support of the camp administration and was actually part of the structure of the 3rd Reich. Prisoners arrived at the death camps by deception. Their motivation for coming to the extermination camp was propaganda films, postcards sent to them by previous prisoners who had already been killed in the camps, and being forced into deception by the forces of Nazi Germany. Some came on their own, in the hope that they were not going to a death camp, but to a settlement where they would be provided with work, food, and housing. Prisoners in the camp were forced to write postcards without a date or with an incorrect date, usually a date after their death, about how well they were doing in the death camp, and in the text of the postcard they were forced to write an invitation to come to those to whom the postcard was addressed. Prisoners were also forced to write the wrong departure address on the postcards, so that the deceived invitees would be sure that they were not going to a death camp, but to some settlement with a similar name. Far from being the main method of exterminating people, gas chambers were a method of ritual mass serial murder. The so-called selection was carried out not only on ethnic grounds or for health reasons, it was carried out, among other things, to perform the ritual of killing certain individuals. Numerous medical experiments were also practiced in the death camps, the purpose of which was to test and develop new types of weapons, drugs, determine the body's ability to resist, determine the limits of survival of the human body, and develop ways to increase life expectancy. In addition, blood was taken from prisoners and newborn children were also taken for the purpose of performing ritual murders. Thus, in the death camps, a whole system of falsifying addresses, personal cards and personal data of prisoners was created, and internal business processes were organized in a special way so that it was impossible to establish either the real identity of the prisoners, or the real date of their death, or the cause of their death. . Actually, for the same reasons, the prisoners themselves from among the criminal element were used to carry out the main dirty work of murder. At the trials of the Nazis, in addition to photographs of corpses and testimony about the presence of corpses, including in crematoria, in the camps themselves, in gas chambers, in the vast majority of cases no evidence was presented confirming the fact of the execution of murders in the death camps by those to whom it was charged. Taking into account the established system of falsification of addresses and personal data, as well as the system of falsification of dates in postcards that were written by prisoners before death and sent after their death, as well as the facts of the discovery of spontaneous bonfires for burning corpses in quantities of several thousand in areas in the immediate vicinity of death camps, and the facts of the lack of registration in principle of the deaths of prisoners as they were transported to the camps, during which up to 90% of those sent to the final destination of the death camp died, it should be said that the real number of victims who died in death camps, concentration camps, prisoner of war camps, and during transportation between them, is underestimated by at least 10 times. This figure is also an underestimate because it does not take into account the number of newborns killed in the camps.