It is the single most important statistic regarding the illegal US invasion and occupation of Iraq. How many Iraqis have been killed? 655,000. 655,000 Iraqis killed as a result of the US invasion and occupation of Iraq. I have worked for eight months in Iraq as a journalist, witnessing the carnage on a daily basis...Finally, we get an accurate figure that shows how immense the scale of the long drawn carnage really is.