US War deaths
The war in Vietnam and the spillover conflicts in Laos and Cambodia were even more lethal. These numbers are also hard to pin down, although by several scholarly estimates, Vietnamese military and civilian deaths ranged from 1.5 million to 3.8 million, with the U.S.-led campaign in Cambodia resulting in 600,000 to 800,000 deaths, and Laotian war mortality estimated at about 1 million.
Despite the fact that contemporary weapons are vastly more precise, Iraq war casualties, which are also hard to quantify, have reached several hundred thousand. In mid-2006, two household surveys -- the most scientific means of calculating -- found 400,000 to 650,000 deaths, and there has been a lot of killing since then. (The oft-cited Iraq Body Count Web site mainly uses news accounts, which miss much of the violence.)
The war in Afghanistan has been far less violent than the others, with civilian and military deaths estimated at about 100,000.
The numbers can be confusing because some estimates include only those people killed by direct violence; others include deaths from “structural” violence -- such as those resulting from a destroyed health-care system.http://www.washingtonpost.com/opinions/why-do-we-ignore-the-civilians-killed-in-american-wars/2011/12/05/gIQALCO4eP_story.html