It's probably LOW for Iraq!
en.wikipedia.org Direct costs

 A Marine Corps M1 Abrams tank patrols a Baghdad street after its fall in 2003 during Operation Iraqi Freedom.
The costs of the War on Terror are often contested, as academics and critics of the component wars (including the Iraq War) have unearthed many hidden costs not represented in official estimates. The most recent major report on these costs come from Brown University in the form of the Costs of War project, which said the total for wars in Iraq, Afghanistan, and Pakistan is at least $3.2-4 trillion. [1] The report disavowed previous estimates of the Iraq War's cost as being under $1 trillion, saying the Department of Defense's direct spending on Iraq totaled at least $757.8 billion, but also highlighting the complementary costs at home, such as interest paid on the funds borrowed to finance the wars and a potential nearly $1 trillion in extra spending to care for veterans returning from combat through 2050. [2]
Those figures are significantly more than typical estimates published just prior to the start of the Iraq War, many of which were based on a shorter term of involvement. For example, in a March 16, 2003 Meet the Press interview of Vice President Dick Cheney, held less than a week before the Iraq War began, host Tim Russert reported that "every analysis said this war itself would cost about $80 billion, recovery of Baghdad, perhaps of Iraq, about $10 billion per year. We should expect as American citizens that this would cost at least $100 billion for a two-year involvement.". [3] |