The Holocaust ended at the end of WWII. The Nazi were defeated due to being defeated in war. They were defeated by Russia and the U.S who were called the allies. The Holocaust ended in certain places when the allies let go of the prisoners in the camps in 1944-1945. After Hitler died in 1945, the Germans decided surrendered and let go of all Jewish prisoners. The allied armies all came into Germany to let go of the concentration camps and people.