500,000 to 1,000,000

Killers with a tally between 500,000 and 1,000,000 include:

Ion Antonescu
Country: Romania
Kill tally details: About 200,000 Romanian Jews, about 180,000 Jews from Transnistria, about 11,000 Roma, and at least 110,000 Romanian soldiers
Théoneste Bagosora
Country: Rwanda
Kill tally details: Over 500,000 Tutsis and thousands of moderate Hutus during the Rwandan genocide of 1994. (The International Criminal Tribunal for Rwanda estimates "some 800,000 Rwandans were killed." Other sources estimate that between 800,000 and one million were killed)
Ante Pavelic
Country: Croatia
Kill tally details: 300,000 to one million, including up to 30,000 Jews, up to 29,000 Gipsies, and between 300,000 and 600,000 Serbs