U.S. Has Spent Six Trillion Dollars on Wars That Killed Half a Million People Since 9/11, Report Says
November 14, 2018 Newsweek
"The United States has spent nearly $6 trillion on wars that directly contributed to the deaths of around 500,000 people since the 9/11 attacks of 2001." This article goes on to detail these findings by the Costs of War Project, describing how they break down.