As 1941 began, the nazis started to make transports from the ghettoes of Poland to concentration camps, beginning with those portrayed as the least useful, like the sick, the weak and children. The first mass gassing took place in the camp of Belzec, march 17, 1942. Five more mass killing centers were built at camps in occupied Poland, Chelmo, Sobibor, Majdenek, Treblinka, and Auschwizt-Birkmau. Jews from all over Europe began to get deported to death camps from 1942 to 1945. It was in the summer and fall of 1942 when the heaviest deportations took place, more than 300000 people were deported from Warsaw ghettoes alone. The nazis tried keeping the camps secret, but it was impossible, the scale of killing was too high. Eyewitnesses brought reports of Nazi atrocities in Poland to the Allied governments, who were harshly criticized after the war for their failure to 
respond, or to publicize news of the mass slaughter. The lack of action was most likely due from the Allied focus on winning the war. In Auschwizt, more than 2 million people were killed in a process resembling a large scale industrial operation. There in the camp, a large population of non-Jewish and Jewish inmates worked in labor. Only Jews were gassed, and thousands of others died from starvation and diseases, more than 12000 people died every day at the camps. carved into a cell in a concentration camp, a jewish prisoner carved: “If there is a God, he will have to beg my forgiveness.”