Filed at 6:13 p.m. ET
Here is a list of some of the world's deadliest conflicts and regimes since 1970, with estimates of the number killed. Saddam Hussein's regime in Iraq buried as many as 300,000 opponents in mass graves across the country, according to the top human rights official in the U.S.-led civilian administration.
Bangladesh's war of independence from Pakistan, 1971: 1 million dead
Uganda's Idi Amin, 1971-1979: up to 300,000 dead in ethnic warfare and suppression of opposition.
Cambodia's Khmer Rouge, 1975-1978: 1.5 million dead.
Lebanon's civil war, 1975-1991: 100,000 dead.
Indonesia's invasion and rule of East Timor, 1976-2002: 200,000 dead.
Iran-Iraq war, 1980-1988: 1.5 million dead.
Sudan's civil war 1983-2003, 100,000 dead from fighting, hunger and disease blamed on war.
Colombia's civil war, 1984-2003: 200,000 dead.
Liberian civil war, 1990-1997; 40,000 dead.
Algeria civil war, 1991-2002: 60,000 dead
Balkan Wars, 1991-1999: 270,000 dead
Rwandan genocide, 1994: 800,000 dead
Russia's war in Chechnya, 1999-2002, 20,000 dead
Congolese civil war 1996-2002: 3.3 million dead from fighting, hunger and disease blamed on war.
From: Center for Systemic Peace, Human Rights Watch and Amnesty International.