The governments of the German Empire and Nazi Germany (under Adolf Hitler) ordered, organized and condoned a substantial number of war crimes, first in the Herero and Namaqua genocide and then in the First and Second World Wars. The most notable of these is the Holocaust in which millions of Jews and Romani were systematically murdered. Millions of civilians and prisoners of war also died as a result of German abuse, mistreatment, and deliberate starvation policies in those two conflicts. Much of the evidence was deliberately destroyed by the perpetrators, such as in Sonderaktion 1005, in an attempt to conceal the crimes.