Hitler targeted Jews and others he deemed "undesirable" for persecution and genocide. His Nazi regime enacted racist laws that stripped Jews of citizenship and rights, and violence against Jews escalated. Hitler's "Final Solution" was the systematic extermination of Jews in concentration and death camps, where millions were killed through gas chambers, medical experiments, starvation, and disease. Though reports of the atrocities reached Allied leaders, they did not take significant action to stop the genocide until liberating the camps at the end of the war. The Holocaust resulted in the deaths of 6 million Jews and 5 million others.