The U.S. has spent over $5.9 trillion on wars that have directly led to the deaths of close to 500,000 people since the 9/11 attacks in September 2001.
Around 370,000 died due to direct war-related violence, while several times more died as a result of the indirect effects of war such as malnutrition and damaged infrastructure, according to Costs of War, an annual research project published by the Watson Institute for International and Public Affairs at Brown University.
Some 250,000 civilians have perished as a result of the fighting caused by American wars, which have displaced or made refugees of 10.1 million people in Iraq, Afghanistan and Pakistan, the project found.
Over 6,900 U.S. military personnel have died at war, in addition to over 7,800 U.S. contractors and over 110,000 enemy fighters.
The figures do not include the over 500,000 deaths from the Syrian war, which has raged since 2011 when rebels backed by the U.S. and other Western powers tried to overthrow the government of President Bashar Al-Assad.