Edit: I realised that I spelled Pissingers name wrong in the title. Pity.
This demonic entity in human form was good friends with August Pinochet, who during his coup of Chile murdered anyone left of him in extremely vicious ways
He also presided over the bombing of Cambodia and Laos, leaving both nations with so much unexploded ordnance that to this day, thousands are maimed every year despite the Vietnam war being decades over
He is directly responsible for at least two genocides
May he rest in eternal hellfire and boiling piss