The Iraq War has cost the US nearly $2 trillion

The Costs of Wars project was started in 2011 to assess the long-term consequences of the post-9/11 wars. Project co-director Neta C. Crawford, professor and chair of political science at Boston University, explains the major implications of the Iraq War for the federal budget. ....
http://theconversation.com/the-iraq-war-has-cost-the-us-nearly-2-trillion-129617