Holocaust/Shoah was the systematic, state-sponsored persecution and murder of approximately 11 million people by the Nazi regime in Germany and its collaborators during the Second World War.

The Khmer Rouge regime, who ruled Cambodia between 1975 and 1979, had resorted to various genocide methods to eliminate or suppress any elements that they thought would prevent them from achieving their goals.

The genocide (1994 Genocide of Tutsis) in Rwanda between April 7 and July 4, 1994 (within about 100 days), when more than 1 million Tutsis were killed, along with the moderate Hutus, made its mark in history as one of the most brutal and savage slaughters that human history has ever witnessed.

The Bosnian Serb forces carried out the biggest massacre of the Bosnian War in the city of Srebrenica in Bosnia and Herzegovina, which was declared a "safe zone" by the UN Security Council resolution 819/1993, in July 1995.